CN114536264B - Blast furnace blowpipe and middle section flange installation auxiliary tool - Google Patents
Blast furnace blowpipe and middle section flange installation auxiliary tool Download PDFInfo
- Publication number
- CN114536264B CN114536264B CN202011339097.0A CN202011339097A CN114536264B CN 114536264 B CN114536264 B CN 114536264B CN 202011339097 A CN202011339097 A CN 202011339097A CN 114536264 B CN114536264 B CN 114536264B
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- Prior art keywords
- flange
- wedge
- shaped sliding
- sliding block
- blowpipe
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- 238000009434 installation Methods 0.000 title claims description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 210000001503 joint Anatomy 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blast Furnaces (AREA)
Abstract
The invention relates to the technical field of blast furnace blowpipe disassembly and assembly, in particular to an auxiliary tool for installing a blast furnace blowpipe and a middle section flange, which comprises a first tool body, an upper clamping horse and a lower clamping horse which are oppositely arranged on the first tool body at intervals up and down, a first wedge-shaped sliding block which can be horizontally and slidably arranged on an upper clamping Ma Debu, a driving piece fixedly arranged on a lower clamping horse, a supporting plate which is driven by the driving piece to lift and a second wedge-shaped sliding block which can be horizontally and slidably arranged on the supporting plate, wherein the inclined surface of the first wedge-shaped sliding block is in contact fit with the inclined surface of the second wedge-shaped sliding block. The two opposite ends of the two wedge-shaped sliding blocks are oppositely inserted into flange holes of the blowpipe flange and the middle section flange, the driving piece drives the supporting plate to drive the second wedge-shaped sliding blocks to ascend, the two wedge-shaped sliding blocks are mutually interacted to generate horizontal relative displacement through inclined surface contact matching, the two flanges are driven to generate relative displacement, automatic alignment of the two flange holes is realized, and the assembly of the blowpipe flange and the middle section flange is facilitated.
Description
Technical Field
The invention relates to the technical field of blast furnace blowpipe disassembly and assembly, in particular to an auxiliary tool for installing a blast furnace blowpipe and a middle section flange.
Background
In the blast furnace regional blow pipe replacement project construction, the blow pipe is connected through the flange with the middle section, sometimes the dislocation of middle section flange face and blow pipe flange face is very big, and the metal pad can not install in the groove, and even some even the bolt is all installed, need draw the middle section outside with chain block, and the blow pipe flange face can not fine contact with middle section flange face, forms certain contained angle, and along with the increase of time, the contained angle also can increase, hardly seals tightly the blow pipe with the flange face of middle section, leads to blow pipe and middle section flange assembly not put in place.
Disclosure of Invention
The invention aims to provide an auxiliary tool for installing a blast furnace blowpipe and a middle section flange, which is beneficial to assembling the blowpipe and the middle section flange in place, so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a blast furnace blowpipe and well festival flange installation appurtenance, includes first instrument body, upper and lower card horse and the lower card horse of locating relatively on the first instrument body of interval from top to bottom, but the first wedge slider of upper card Ma Debu is located to horizontal slip, set firmly in the drive piece at right of lower card, driven the backup pad that goes up and down by the drive piece and but the second wedge slider of locating in the backup pad with horizontal slip, but the inclined plane of first wedge slider contacts the cooperation with the inclined plane of second wedge slider.
Preferably, the support plate is arranged on the first tool body in a lifting manner.
Preferably, the driving member is a hydraulic jack.
Preferably, the first wedge sled is the same size as the second wedge sled.
Preferably, the telescopic tool further comprises a second tool body, a telescopic part fixedly arranged at the lower end of the second tool body and a clamping part detachably arranged at the upper end of the second tool body, wherein the telescopic part is provided with a telescopic end which can extend and retract along the axial direction of the second tool body, and the telescopic end and the clamping part are oppositely arranged at intervals.
Preferably, the second tool body is a screw.
Preferably, the clamping piece is a first screw cap, and the first screw cap is in threaded connection with the screw rod.
Preferably, the telescopic member is in threaded connection with the screw.
Preferably, a second nut is arranged at the lower end of the telescopic piece on the screw rod, and the second nut is in threaded connection with the screw rod.
Preferably, the telescopic member is a hydraulic hollow jack.
Compared with the prior art, the invention has obvious progress:
In the blast furnace area blowpipe replacement construction, if dislocation exists between a blowpipe flange surface and a middle section flange surface, the blast furnace blowpipe and the middle section flange installation auxiliary tool can be utilized, two opposite ends of a first wedge-shaped sliding block and a second wedge-shaped sliding block on a first tool body are relatively inserted into a flange hole of the blowpipe flange and a flange hole of the middle section flange, then a driving piece drives a supporting plate to ascend, the second wedge-shaped sliding block is driven by the supporting plate to ascend, the second wedge-shaped sliding block is interacted with the first wedge-shaped sliding block through inclined surface contact fit between the second wedge-shaped sliding block and the first wedge-shaped sliding block to generate horizontal relative displacement, and the two flanges are driven to generate relative displacement through contact between the second wedge-shaped sliding block and the flange hole of the blowpipe flange and the flange hole of the middle section flange until axes of the two flange holes coincide; then the driving piece drives the supporting plate to descend, the supporting plate drives the second wedge-shaped sliding block to descend, and the first wedge-shaped sliding block and the second wedge-shaped sliding block can be withdrawn from the flange hole of the blowpipe flange and the flange hole of the middle section flange respectively. Therefore, the automatic alignment of the flange holes of the blowpipe flange and the flange holes of the middle section flange is realized, and the assembly of the blowpipe flange and the middle section flange in place is facilitated.
Drawings
FIG. 1 is a schematic view of a first tool body and its components in a blast furnace lance and middle flange installation aid according to an embodiment of the present invention.
FIG. 2 is a schematic view of a blast furnace lance tube and middle flange mounting auxiliary tool, a second tool body and its components according to an embodiment of the present invention.
Wherein reference numerals are as follows:
11. First tool body 12, upper clamping horse
13. Lower clamping horse 14, first wedge-shaped slide block
15. Driving member 16, support plate
17. Second wedge-shaped slide block 21 and second tool body
22. Expansion piece 23, clamping piece
24. Flange hole of second screw cap 3 and blowpipe flange
4. Flange hole 5 and flange group of middle section flange
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus 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. Furthermore, 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.
In the description of the present invention, 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 or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1 and 2, one embodiment of the blast furnace lance and middle joint flange mounting aid of the present invention.
Referring to fig. 1, the blast furnace blowpipe and middle flange mounting auxiliary tool of the present embodiment includes a first tool body 1, and an upper clamping horse 12, a lower clamping horse 13, a first wedge-shaped slider 14, a driving member 15, a support plate 16, and a second wedge-shaped slider 17 are provided on the first tool body 1.
The upper clamping horse 12 and the lower clamping horse 13 are arranged on the first tool body 1 in a vertically opposite manner at intervals, preferably, the first tool body 1 can be a block-shaped body, the upper clamping horse 12 and the lower clamping horse 13 are horizontally arranged on one side of the block-shaped first tool body 1, and the upper clamping horse 12 is positioned above the lower clamping horse 13. The first wedge-shaped sliding block 14, the second wedge-shaped sliding block 17 and the supporting plate 16 are arranged between the upper clamping horse 12 and the lower clamping horse 13, the first wedge-shaped sliding block 14 can be horizontally arranged at the bottom of the upper clamping horse 12 in a sliding mode, the second wedge-shaped sliding block 17 can be horizontally arranged on the supporting plate 16 in a sliding mode, the supporting plate 16 is opposite to the upper clamping horse 12 at intervals, the first wedge-shaped sliding block 14 and the second wedge-shaped sliding block 17 are arranged between the upper clamping horse 12 and the supporting plate 16, the first wedge-shaped sliding block 14 and the second wedge-shaped sliding block 17 are oppositely arranged, and the inclined surface of the first wedge-shaped sliding block 14 is in contact fit with the inclined surface of the second wedge-shaped sliding block 17. The driving member 15 is fixedly arranged on the lower clamping horse 13, the driving member 15 is connected with the supporting plate 16, the supporting plate 16 is driven by the driving member 15 to lift, the second wedge-shaped sliding block 17 is driven by the lifting of the supporting plate 16 to lift synchronously, the first wedge-shaped sliding block 14 can be pushed to slide horizontally at the bottom of the upper clamping horse 12 by the inclined contact fit between the second wedge-shaped sliding block 17 and the first wedge-shaped sliding block 14 by the action of the second wedge-shaped sliding block 17 along with the lifting of the supporting plate 16, and meanwhile, the first wedge-shaped sliding block 14 is reacted with the second wedge-shaped sliding block 17 to enable the second wedge-shaped sliding block 17 to slide horizontally on the supporting plate 16, namely, the first wedge-shaped sliding block 14 and the second wedge-shaped sliding block 17 are enabled to displace horizontally and relatively.
Therefore, in the blast furnace area blowpipe replacement construction, if dislocation exists between the blowpipe flange surface and the middle section flange surface during the assembly of the blowpipe flange and the middle section flange, the auxiliary tool for installing the blast furnace blowpipe and the middle section flange can be utilized, the opposite ends of the first wedge-shaped slide block 14 and the second wedge-shaped slide block 17 on the first tool body 1 are inserted into the flange hole 3 of the blowpipe flange and the flange hole 4 of the middle section flange, wherein the end part of the first wedge-shaped slide block 14 sequentially penetrates through the flange hole 3 of the blowpipe flange and the flange hole 4 of the middle section flange, the end part of the second wedge-shaped slide block 17 sequentially penetrates through the flange hole 4 of the middle section flange and the flange hole 3 of the blowpipe flange (as shown in fig. 1), then the support plate 16 is driven by the driving piece 15 to ascend, the second wedge-shaped slide block 17 is driven by the support plate 16 to ascend, the second wedge-shaped slide block 17 is interacted with the first wedge-shaped slide block 14 through the inclined surface contact between the second wedge-shaped slide block 17 and the first wedge-shaped slide block 14 to horizontally relatively displace, and the two wedge-shaped slide blocks are enabled to act on the flange holes 3 and the flange holes through the second wedge-shaped slide block 17 and the flange 14 until the two flange holes are coincident with each other; then the supporting plate 16 is driven to descend by the driving piece 15, the second wedge-shaped sliding block 17 is driven to descend by the supporting plate 16, and the first wedge-shaped sliding block 14 and the second wedge-shaped sliding block 17 can be withdrawn from the flange hole 3 of the blowpipe flange and the flange hole 4 of the middle section flange respectively. Thereby realizing the automatic alignment of the flange hole 3 of the blowpipe flange and the flange hole 4 of the middle section flange, and facilitating the assembly of the blowpipe flange and the middle section flange in place.
In this embodiment, the sizes of the first wedge-shaped slide block 14 and the second wedge-shaped slide block 17 are not limited, and may be designed according to the sizes of the flange hole 3 of the assembled blowpipe flange and the flange hole 4 of the middle section flange, so that opposite ends of the first wedge-shaped slide block 14 and the second wedge-shaped slide block 17 can be inserted into the flange hole 3 of the blowpipe flange and the flange hole 4 of the middle section flange. Preferably, in this embodiment, the first wedge sled 14 is the same size as the second wedge sled 17.
In this embodiment, preferably, the support plate 16 is disposed on the first tool body 1 in a liftable manner, and the first tool body 1 supports the support plate 16 and guides the lifting of the support plate 16.
In this embodiment, the support plate 16 may preferably be a steel plate.
In this embodiment, the driving member 15 may preferably be a hydraulic jack, and the hydraulic jack may be an electro-hydraulic jack. Preferably, the hydraulic jack and the lower clamping horse 13 can be connected through threads, so that the hydraulic jack is installed and fixed on the lower clamping horse 13.
Further, referring to fig. 2, the blast furnace blowpipe and middle flange mounting auxiliary tool of the present embodiment further includes a second tool body 21, and a telescopic member 22 and a clamping member 23 are provided on the second tool body 21. The second tool body 21 is a cylindrical body that can pass through a set of flange holes in the flange set 5, and the flange set 5 includes a butt-jointed blowpipe flange and a middle section flange. The telescopic member 22 is fixedly arranged at the lower end of the second tool body 21, and the telescopic member 22 is provided with a telescopic end which can be telescopic along the axial direction of the second tool body 21. The clamping piece 23 is detachably arranged at the upper end of the second tool body 21, and the clamping piece 23 and the telescopic end of the telescopic piece 22 are oppositely arranged at intervals.
Therefore, when the blast furnace pipe flange and the middle section flange are assembled in the blast furnace area blast pipe replacement construction, if the blast furnace pipe flange surface and the middle section flange surface are not in good contact and form an included angle, the auxiliary tool for installing the blast furnace pipe and the middle section flange can be utilized, the clamping piece 23 on the second tool body 21 is firstly detached, then the second tool body 21 passes through a group of flange holes opposite to the blast pipe flange and the middle section flange, the telescopic end of the telescopic piece 22 is abutted against the blast pipe flange (or the middle section flange), then the clamping piece 23 is installed and fixed on the second tool body 21, the clamping piece 23 is abutted against the middle section flange (or the blast pipe flange), finally the telescopic end of the telescopic piece 22 is extended, and the included angle between the blast pipe flange surface and the middle section flange surface can be gradually reduced under the pressure applied by the telescopic end of the telescopic piece 22 until the blast pipe flange surface is abutted against the middle section flange surface; the telescoping end of the telescoping member 22 is then retracted and the clamping member 23 is removed, thereby allowing the second tool body 21 to be withdrawn from the opposed set of flange bores of both the torch flange and the middle flange. Therefore, the automatic contact and lamination of the blowpipe flange surface and the middle section flange surface are realized, the included angle between the blowpipe flange surface and the middle section flange surface can be eliminated, and the assembly of the blowpipe flange and the middle section flange in place is facilitated.
In this embodiment, the second tool body 21 may be preferably a screw, and an external thread is provided on an outer circumferential surface of the screw. The size of the screw rod is not limited, and the screw rod can be designed according to the sizes of the flange holes of the assembled blowpipe flange and the flange holes of the middle section flange, so that the screw rod can penetrate through the flange holes of the blowpipe flange and the flange holes of the middle section flange.
Preferably, the clamping piece 23 can be a first nut, and the first nut is in threaded connection with the screw rod, so that the clamping piece has the advantages of convenience in assembly and disassembly and good connection stability.
Preferably, the telescopic piece 22 is sleeved on the outer peripheral surface of the screw rod, and the telescopic piece 22 is internally provided with an internal thread which is matched and connected with the external thread of the screw rod, and the telescopic piece 22 can be in threaded connection with the screw rod, so that the screw rod has the advantages of convenience in assembly and good connection stability.
Preferably, a second nut 24 is provided on the screw at the lower end of the telescopic member 22, and the second nut 24 is in threaded connection with the screw. The second nut 24 abuts against the lower end of the telescopic member 22, and plays a role in limiting and fixing the telescopic member 22.
In this embodiment, the telescopic member 22 may preferably be a hydraulic hollow jack, i.e. a through-the-heart hydraulic jack.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
1. The blast furnace blowpipe and middle section flange installation auxiliary tool is characterized by comprising a first tool body (11), an upper clamping horse (12) and a lower clamping horse (13) which are oppositely arranged on the first tool body (11) at intervals up and down, a first wedge-shaped sliding block (14) which can be horizontally and slidably arranged at the bottom of the upper clamping horse (12), a driving piece (15) fixedly arranged on the lower clamping horse (13), a supporting plate (16) which is driven by the driving piece (15) to lift, and a second wedge-shaped sliding block (17) which can be horizontally and slidably arranged on the supporting plate (16), wherein the inclined surface of the first wedge-shaped sliding block (14) is in contact fit with the inclined surface of the second wedge-shaped sliding block (17); when the blowpipe flange and the middle joint flange are assembled, if dislocation exists between the blowpipe flange surface and the middle joint flange surface, two opposite ends of the first wedge-shaped sliding block (14) and the second wedge-shaped sliding block (17) on the first tool body (11) are relatively inserted into a flange hole (3) of the blowpipe flange and a flange hole (4) of the middle joint flange, the supporting plate (16) is driven to ascend by the driving piece (15), the second wedge-shaped sliding block (17) is driven to ascend by the supporting plate (16), and through the inclined surface contact fit between the second wedge-shaped sliding block (17) and the first wedge-shaped sliding block (14), the second wedge-shaped sliding block (17) and the first wedge-shaped sliding block (14) interact to generate horizontal relative displacement, and the two flange holes are driven to generate relative displacement until the two flange holes coincide through the contact effect of the second wedge-shaped sliding block (17) and the flange hole (3) of the first wedge-shaped sliding block (14) and the flange hole (4) of the middle joint flange.
2. Blast furnace blowpipe and middle joint flange installation aid according to claim 1, characterized in, that the support plate (16) is liftable on the first tool body (11).
3. Blast furnace lance and intermediate flange mounting aid according to claim 1, characterized in that the driving member (15) is a hydraulic jack.
4. Blast furnace lance and intermediate flange mounting aid according to claim 1, characterized by the fact that the first wedge-shaped slide (14) is of the same size as the second wedge-shaped slide (17).
5. The blast furnace blowpipe and middle joint flange installation auxiliary tool according to any one of claims 1 to 4, further comprising a second tool body (21), a telescopic member (22) fixedly arranged at the lower end of the second tool body (21), and a clamping member (23) detachably arranged at the upper end of the second tool body (21), wherein the telescopic member (22) has a telescopic end capable of extending and contracting along the axial direction of the second tool body (21), and the telescopic end and the clamping member (23) are oppositely arranged at intervals.
6. Blast furnace lance and intermediate flange mounting aid according to claim 5, characterized in that the second tool body (21) is a screw.
7. The blast furnace blowpipe and middle joint flange installation auxiliary tool according to claim 6, wherein the clamping piece (23) is a first nut, and the first nut is in threaded connection with the screw rod.
8. Blast furnace lance and intermediate flange mounting aid according to claim 6, characterized in that the telescopic element (22) is screwed with the screw.
9. The blast furnace blowpipe and middle joint flange installation auxiliary tool according to claim 8, wherein a second nut (24) is provided on the screw rod at the lower end of the expansion piece (22), and the second nut (24) is in threaded connection with the screw rod.
10. Blast furnace lance and intermediate flange mounting aid according to claim 5, characterized in that the telescopic element (22) is a hydraulic hollow jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011339097.0A CN114536264B (en) | 2020-11-25 | 2020-11-25 | Blast furnace blowpipe and middle section flange installation auxiliary tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011339097.0A CN114536264B (en) | 2020-11-25 | 2020-11-25 | Blast furnace blowpipe and middle section flange installation auxiliary tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114536264A CN114536264A (en) | 2022-05-27 |
| CN114536264B true CN114536264B (en) | 2024-04-19 |
Family
ID=81659494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011339097.0A Active CN114536264B (en) | 2020-11-25 | 2020-11-25 | Blast furnace blowpipe and middle section flange installation auxiliary tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114536264B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201603993U (en) * | 2009-12-10 | 2010-10-13 | 中冶宝钢技术服务有限公司 | Centering and aligning device for pipeline flanges |
| CN201922404U (en) * | 2010-12-06 | 2011-08-10 | 东莞市骏朗自动化科技有限公司 | Assistant supporting device |
| CN103538006A (en) * | 2013-10-08 | 2014-01-29 | 安徽晋煤中能化工股份有限公司 | C-shaped flange centering alignment device and alignment method thereof |
| CN204381808U (en) * | 2014-12-02 | 2015-06-10 | 四川绵竹川润化工有限公司 | A kind of aid aligning installation for large-sized flange |
| CN206200536U (en) * | 2016-09-29 | 2017-05-31 | 新疆广汇新能源有限公司 | Underwater flange centralising device |
| CN110778819A (en) * | 2019-11-05 | 2020-02-11 | 攀钢集团西昌钢钒有限公司 | Installation method of blast furnace air inlet pipeline and hydraulic system |
| CN210340224U (en) * | 2019-08-16 | 2020-04-17 | 江苏维普光电科技有限公司 | Lifting device based on wedge-shaped pushing |
-
2020
- 2020-11-25 CN CN202011339097.0A patent/CN114536264B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201603993U (en) * | 2009-12-10 | 2010-10-13 | 中冶宝钢技术服务有限公司 | Centering and aligning device for pipeline flanges |
| CN201922404U (en) * | 2010-12-06 | 2011-08-10 | 东莞市骏朗自动化科技有限公司 | Assistant supporting device |
| CN103538006A (en) * | 2013-10-08 | 2014-01-29 | 安徽晋煤中能化工股份有限公司 | C-shaped flange centering alignment device and alignment method thereof |
| CN204381808U (en) * | 2014-12-02 | 2015-06-10 | 四川绵竹川润化工有限公司 | A kind of aid aligning installation for large-sized flange |
| CN206200536U (en) * | 2016-09-29 | 2017-05-31 | 新疆广汇新能源有限公司 | Underwater flange centralising device |
| CN210340224U (en) * | 2019-08-16 | 2020-04-17 | 江苏维普光电科技有限公司 | Lifting device based on wedge-shaped pushing |
| CN110778819A (en) * | 2019-11-05 | 2020-02-11 | 攀钢集团西昌钢钒有限公司 | Installation method of blast furnace air inlet pipeline and hydraulic system |
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| Publication number | Publication date |
|---|---|
| CN114536264A (en) | 2022-05-27 |
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