CN114198500B - Method for sealing throat manhole - Google Patents
Method for sealing throat manhole Download PDFInfo
- Publication number
- CN114198500B CN114198500B CN202111438936.9A CN202111438936A CN114198500B CN 114198500 B CN114198500 B CN 114198500B CN 202111438936 A CN202111438936 A CN 202111438936A CN 114198500 B CN114198500 B CN 114198500B
- Authority
- CN
- China
- Prior art keywords
- sealing
- manhole
- throat
- port
- asbestos rope
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000010425 asbestos Substances 0.000 claims abstract description 43
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000002791 soaking Methods 0.000 claims abstract description 11
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 11
- 239000012267 brine Substances 0.000 claims abstract description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 6
- 238000010009 beating Methods 0.000 claims abstract description 6
- 239000011780 sodium chloride Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 230000009191 jumping Effects 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 4
- 150000003839 salts Chemical class 0.000 claims description 35
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 6
- 235000014121 butter Nutrition 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
Abstract
The embodiment of the application discloses a method for sealing a throat manhole, which relates to the field of blast furnace pressure medium sealing and comprises the following steps: 1) Cleaning the manhole cover and the manhole groove, and soaking the asbestos rope in saline water; 2) Placing the asbestos rope soaked with brine into the manhole groove from the second sealing port, winding the asbestos rope around the manhole groove for one circle, and hammering the asbestos rope by a hammer for a certain distance D beyond the initial position; 3) Covering the cover onto the manhole and fixing the sealing assembly on the five sealing ports; 4) Sequentially beating the sealing components on the second sealing port and the fourth sealing port and the manhole rotating shaft by using a large hammer according to the reverse triangular sequence, and then sequentially beating the sealing components on the third sealing port, the first sealing port and the fifth sealing port according to the regular triangular sequence; 5) Repeating the step 4) for 2-3 times, and completing sealing when the large hammer sealing assembly hears 'jumping' sound. The method can normalize sealing operation, and effectively solve the major equipment hidden trouble of gas leakage of the manhole of the furnace throat.
Description
Technical Field
The application relates to the field of blast furnace pressure medium sealing, in particular to a method for sealing a throat manhole.
Background
A large number of inspection manholes exist in a blast furnace hot air system, a crude gas system, a furnace top charging system and the like, and each inspection needs to be performed by opening part of manholes, so that the manholes must be successfully fastened once when the manholes are fastened, the sealing tightness of the manholes must be ensured, the manholes are not tightly sealed after the blast furnace is supplied with air, the air stopping treatment is necessary, and the secondary air stopping fault of the blast furnace is caused. In the main body system of the iron-smelting blast furnace, almost all gas medium pipeline systems are single systems, equipment stops running, and pressure relief and pressure reduction of a manhole mean that the production of the blast furnace is stopped and reduced. Because of the continuity of the blast furnace production, the short-time air stopping and air reducing can have great influence on the furnace condition, the continuous and stable operation of the blast furnace is influenced, the integral operation condition of the blast furnace is directly influenced, and the yield of the blast furnace is reduced.
At present, no system description aiming at the technology exists in the domestic peer industry, particularly, a manhole of a saline asbestos rope for soaking and buckling a pin plate is not standard, and the peer industry generally adopts a master with abundant experience to carry out the work.
In actual production work, the phenomenon of manhole gas leakage exists after each inspection, hidden danger is brought to the safety of inspection personnel, great equipment hidden danger exists, the salt expansion in the salt water asbestos rope when encountering high temperature plays a sealing role, the salt water of the salt water asbestos rope is soaked in the salt water, the soaking degree is different, some salt water does not even reach the sealing requirement, meanwhile, the striking sequence of 5 pin plates of the manhole is random and standard, the sealing pressure port is uneven, and the salt water asbestos rope is soaked well, so that the phenomenon of wind leakage occurs in the manhole, and how to solve the technical problems is unprecedented.
Content of the application
The purpose of the application is to provide a method for sealing a throat manhole, so as to solve the technical problems in the prior art: how to solve the problem of wind leakage caused by uneven sealing pressure opening because of no standard when the manhole of the furnace throat is sealed.
In order to solve the technical problems, the application adopts the following technical scheme:
the first aspect of the embodiments of the present application provides a method for sealing a throat manhole, wherein a hole cover, a manhole groove, a manhole rotating shaft and five sealing ports are arranged on the throat manhole, the manhole rotating shaft and the five sealing ports are uniformly and circumferentially arranged on the outer side of the throat manhole, and each sealing port is provided with a sealing component; the five sealing ports are respectively arranged along the anticlockwise direction of the manhole rotating shaft: a first seal, a second seal, a third seal, a fourth seal, and a fifth seal;
the method comprises the following steps:
1) Cleaning the manhole cover and the manhole groove, and soaking the asbestos rope in saline water;
2) Placing the asbestos rope soaked with brine into the manhole groove from the second sealing port, winding the asbestos rope around the manhole groove for one circle, and hammering the asbestos rope by a hammer for a certain distance D beyond the initial position;
3) Covering the cover onto the manhole and fixing the sealing assembly on the five sealing ports;
4) Sequentially beating the sealing components on the second sealing port and the fourth sealing port and the manhole rotating shaft by using a large hammer according to the reverse triangular sequence, and then sequentially beating the sealing components on the third sealing port, the first sealing port and the fifth sealing port according to the regular triangular sequence;
5) Repeating the step 4) for 2-3 times, and completing sealing when the large hammer sealing assembly hears 'jumping' sound.
In some embodiments, the method of step 1) of immersing the asbestos rope in brine comprises the steps of:
adding salt into a container until the salt content in the water is saturated;
adding salt into the water until a layer of salt is precipitated at the bottom of the container;
the asbestos rope is put into a container for soaking for more than 24 hours and less than 5 months.
In some embodiments, the seal assembly includes a pin plate for sealing the seal port and a pin post for securing the pin plate.
In some embodiments, D is 40mm to 70mm in step 2).
In some embodiments, in step 2), after the asbestos rope is hammered out with a hand hammer, a layer of butter is also spread on the asbestos rope.
In some embodiments, if the pin plate bounces when the pin plate is knocked in step 4), the pin plate is taken out, a welding rod is inserted into the installation position of the pin plate, and then the pin plate is fixed.
In some embodiments, in step 2), the asbestos cord has a diameter of 10mm to 15mm.
In some embodiments, the method of determining whether the salt content in the container is saturated is: adding salt into the container for stirring until the salt is still undissolved during stirring, and judging that the salt content in the water is saturated.
In some embodiments, the container is a bucket.
In some embodiments, the salt precipitate has a thickness of 3mm to 6mm.
According to the technical scheme, the application has at least the following advantages and positive effects:
the application discloses a method for sealing a throat manhole, through placing the asbestos rope of soaking brine in the manhole groove, sealing the throat manhole through the high-temperature crystallization of the brine in the asbestos rope at a sealing throat, simultaneously formulating a sealing component and a manhole rotating shaft which are sequentially knocked on a second sealing port and a fourth sealing port according to an inverse triangle sequence, and then sequentially knocking the sealing component on a third sealing port, a first sealing port and a fifth sealing port according to a regular triangle sequence, the sealing operation can be standardized, the serious equipment hidden danger of gas leakage of the manhole can be effectively solved, and the application of the technology has important significance for ensuring continuous and stable operation of various process system equipment of an ironmaking operation part and continuous and stable production of a blast furnace. The method can be also applied to other various manholes for treating similar problems, and has strong portability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a throat manhole structure according to an embodiment;
fig. 2 is a schematic view of a sequence of tapping of a throat manhole according to an embodiment.
The reference numerals are explained as follows: 1. a manhole shaft; 2. a first sealing port; 3. a second sealing port; 4. a third sealing port; 5. a fourth sealing port; 6. a fifth sealing port; 7. a pin plate; 8. a pin column; 9. asbestos rope.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, 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 description of the present application 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 therefore should not be construed as limiting the present application.
The terms "first," "second," and "third" 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", or a third "may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 terms in this application will be understood by those of ordinary skill in the art in a specific context.
Please refer to fig. 1.
FIG. 1 is a schematic view showing the structure of a throat manhole according to one embodiment of a method of sealing a throat manhole of the present application. As shown in the figure, the throat manhole is provided with a hole cover, a manhole groove, a manhole rotating shaft 1 and five sealing openings, and the manhole rotating shaft 1 and the five sealing openings are uniformly and circumferentially arranged at the outer side of the throat manhole;
each sealing port is provided with a sealing component; the sealing assembly comprises a pin plate 7 and a pin column 8, wherein the pin plate 7 is used for sealing the sealing opening, and the pin column 8 is used for fixing the pin plate 7.
The five sealing ports are respectively arranged along the anticlockwise direction of the manhole rotating shaft 1: a first sealing port 2, a second sealing port 3, a third sealing port 4, a fourth sealing port 5 and a fifth sealing port 6;
a method of sealing a throat manhole comprising the steps of:
1) Cleaning the manhole cover and the manhole groove, and soaking the asbestos rope 9 in saline water;
2) Placing the asbestos rope 9 soaked with brine into a manhole groove from the second sealing port 3, winding the asbestos rope around the manhole groove for one circle and exceeding the initial position by 40-70 mm, ensuring that the asbestos rope 9 can fully fill the manhole groove, and hammering the asbestos rope 9 flat by a hammer to ensure the tightness;
3) Covering the cover on the manhole groove, and fixing the pin plate 7 on the five sealing ports through the pin posts 8;
4) As shown in fig. 2, the pin plates 7 on the second sealing port 3 and the fourth sealing port 5 and the manhole shaft 1 are sequentially knocked in a regular triangle order using a large hammer, and then the pin plates 7 on the third sealing port 4, the first sealing port 2 and the fifth sealing port 6 are sequentially knocked in a reverse triangle order; the triangular pin plates 7 with stability are used for knocking the sealing ports, so that the sealing ports are uniformly sealed.
5) Repeating the step 4) for 2-3 times, and completing sealing when the large hammer sealing assembly hears 'jumping' sound. The sound of "bouncing" is heard to indicate that the air tightness in the furnace is good.
In this embodiment, the method of immersing the asbestos rope 9 in saline water comprises the following steps:
adding salt into a container until the salt content in the water is saturated;
adding salt into the water until a layer of salt is precipitated at the bottom of the container;
the asbestos rope 9 is put into a container for soaking for more than 24 hours and less than 5 months.
In this embodiment, in step 2), after the asbestos rope 9 has been hammered down with a hand hammer, a layer of butter is also spread on the asbestos rope 9. The tightness of the asbestos rope 9 is enhanced by butter, and air leakage is placed.
In this embodiment, the phenomenon that the pin plate 7 bounces occurs when the pin plate 7 is knocked in step 4), at this time, the pin plate 7 is taken out, a welding rod is inserted into the installation place of the pin plate 7, and then the pin plate 7 is fixed, so that the occurrence of the bouncing phenomenon can be effectively prevented.
In this embodiment, in step 2), the diameter of the asbestos rope 9 is 10-15 mm, wherein the diameter of the asbestos rope 9 is preferably 13mm.
In this embodiment, the method for judging whether the salt content in the container is saturated is as follows: adding salt into the container for stirring until the salt is still undissolved during stirring, and judging that the salt content in the water is saturated. The saturated brine ensures the sealing properties of the asbestos rope 9.
In this embodiment, the container is a water tub.
In this example, the thickness of the salt precipitate is 3mm to 6mm. Can effectively ensure that the asbestos rope 9 fully absorbs salt. According to the technical scheme, the application has at least the following advantages and positive effects:
the application discloses a method for sealing a throat manhole, through placing the asbestos rope of soaking brine in the manhole groove, sealing the throat manhole through the high-temperature crystallization of the brine in the asbestos rope at a sealing throat, simultaneously formulating a sealing component and a manhole rotating shaft which are sequentially knocked on a second sealing port and a fourth sealing port according to a regular triangle sequence, and then sequentially knocking the sealing component on a third sealing port, a first sealing port and a fifth sealing port according to the regular triangle sequence, the sealing operation can be standardized, the serious equipment hidden danger of gas leakage of the manhole can be effectively solved, and the application of the technology has important significance for ensuring continuous and stable operation of various process system equipment of an ironmaking operation part and continuous and stable production of a blast furnace. The method can be applied to manholes of other factories to treat similar problems, and has strong portability.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. The method for sealing the throat manhole is characterized in that a hole cover, a manhole groove, a manhole rotating shaft and five sealing openings are arranged on the throat manhole, the manhole rotating shaft and the five sealing openings are uniformly and circumferentially arranged on the outer side of the throat manhole, and each sealing opening is provided with a sealing assembly; the five sealing ports are respectively arranged along the anticlockwise direction of the manhole rotating shaft: a first seal, a second seal, a third seal, a fourth seal, and a fifth seal;
the method comprises the following steps:
1) Cleaning the manhole cover and the manhole groove, and soaking the asbestos rope in saline water;
2) Placing the asbestos rope soaked with brine into the manhole groove from the second sealing port, winding the asbestos rope around the manhole groove for one circle, and hammering the asbestos rope by a hammer for a certain distance D beyond the initial position;
3) Covering the cover onto the manhole and fixing the sealing assembly on the five sealing ports;
4) Sequentially beating the sealing components on the second sealing port and the fourth sealing port and the manhole rotating shaft by using a large hammer according to the reverse triangular sequence, and then sequentially beating the sealing components on the third sealing port, the first sealing port and the fifth sealing port according to the regular triangular sequence;
5) Repeating the step 4) for 2-3 times, and completing sealing when the large hammer sealing assembly hears 'jumping' sound;
a method of immersing an asbestos rope in brine in step 1), comprising the steps of:
adding salt into a container until the salt content in the water is saturated;
adding salt into the water until a layer of salt is precipitated at the bottom of the container;
the asbestos rope is put into a container for soaking for more than 24 hours and less than 5 months.
2. The method of sealing a throat manhole of claim 1, wherein the sealing assembly comprises a dowel plate for sealing the sealing port and a dowel post for securing the dowel plate.
3. A method of sealing a throat manhole according to claim 1, wherein in step 2) D is 40mm to 70mm.
4. A method of sealing a throat manhole according to claim 1, characterised in that in step 2) after the rope has been hammered down with a hand hammer, a layer of butter is also applied to the rope.
5. A method of sealing a throat manhole according to claim 3, wherein in step 4) the dowel plate is removed if bouncing of the dowel plate occurs during the tapping of the dowel plate, a welding rod is inserted into the location where the dowel plate is installed, and the dowel plate is then secured.
6. A method of sealing a throat manhole according to claim 1, wherein in step 2) the diameter of the asbestos rope is 10-15 mm.
7. The method for sealing a throat manhole according to claim 2, wherein the method for determining whether the salt content in the vessel is saturated is: adding salt into the container for stirring until the salt is still undissolved during stirring, and judging that the salt content in the water is saturated.
8. A method of sealing a throat manhole according to claim 2, wherein the vessel is a water bucket.
9. A method of sealing a throat manhole according to claim 2, wherein the salt deposit has a thickness of 3mm to 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111438936.9A CN114198500B (en) | 2021-11-30 | 2021-11-30 | Method for sealing throat manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111438936.9A CN114198500B (en) | 2021-11-30 | 2021-11-30 | Method for sealing throat manhole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114198500A CN114198500A (en) | 2022-03-18 |
| CN114198500B true CN114198500B (en) | 2024-02-02 |
Family
ID=80649592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111438936.9A Active CN114198500B (en) | 2021-11-30 | 2021-11-30 | Method for sealing throat manhole |
Country Status (1)
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|---|---|
| CN (1) | CN114198500B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB529826A (en) * | 1939-06-09 | 1940-11-28 | Dudley & Dowell Ltd | Improvements in or relating to manhole covers and frames |
| JP2003090433A (en) * | 2001-09-17 | 2003-03-28 | Niigata Eng Co Ltd | Sealing structure for manhole |
| JP2006206107A (en) * | 2005-01-28 | 2006-08-10 | Kobelco Eco-Solutions Co Ltd | Manhole structure |
| CN201245668Y (en) * | 2008-09-05 | 2009-05-27 | 江阴兴澄特种钢铁有限公司 | Blast furnace ignition artificial apparatus |
| JP2010065949A (en) * | 2008-09-11 | 2010-03-25 | Nippon Steel Corp | Manhole closure wall for vertical melting furnace |
| CN201778039U (en) * | 2010-08-06 | 2011-03-30 | 宝钢集团新疆八一钢铁有限公司 | Improved blast furnace ignition manhole |
| CN203297622U (en) * | 2013-05-31 | 2013-11-20 | 哈尔滨锅炉厂预热器有限责任公司 | Manhole door of air pre-heater |
| CN204201882U (en) * | 2014-10-30 | 2015-03-11 | 南通万达锅炉有限公司 | Manhole inspection door device |
| CN205188328U (en) * | 2015-10-21 | 2016-04-27 | 江苏瑞帆节能科技服务有限公司 | Blast furnace gas bag collector quick -opening manhole |
| CN205368246U (en) * | 2016-02-17 | 2016-07-06 | 宣化钢铁集团有限责任公司 | Chute manhole cover in middle of ability quick assembly disassembly's dry coke quenching |
| CN106066037A (en) * | 2016-06-30 | 2016-11-02 | 兖州煤业股份有限公司 | A kind of boiler smoke wind system leak source method for blocking and a kind of boiler plugging device |
| CN207713755U (en) * | 2018-01-16 | 2018-08-10 | 河北天柱钢铁集团有限公司 | A kind of device improving blast furnace filtering coal gas babinet Manhole Sealing Joints effect |
| CN212867320U (en) * | 2020-06-29 | 2021-04-02 | 中石化江汉石油工程有限公司环保技术服务公司 | Square manhole door |
-
2021
- 2021-11-30 CN CN202111438936.9A patent/CN114198500B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB529826A (en) * | 1939-06-09 | 1940-11-28 | Dudley & Dowell Ltd | Improvements in or relating to manhole covers and frames |
| JP2003090433A (en) * | 2001-09-17 | 2003-03-28 | Niigata Eng Co Ltd | Sealing structure for manhole |
| JP2006206107A (en) * | 2005-01-28 | 2006-08-10 | Kobelco Eco-Solutions Co Ltd | Manhole structure |
| CN201245668Y (en) * | 2008-09-05 | 2009-05-27 | 江阴兴澄特种钢铁有限公司 | Blast furnace ignition artificial apparatus |
| JP2010065949A (en) * | 2008-09-11 | 2010-03-25 | Nippon Steel Corp | Manhole closure wall for vertical melting furnace |
| CN201778039U (en) * | 2010-08-06 | 2011-03-30 | 宝钢集团新疆八一钢铁有限公司 | Improved blast furnace ignition manhole |
| CN203297622U (en) * | 2013-05-31 | 2013-11-20 | 哈尔滨锅炉厂预热器有限责任公司 | Manhole door of air pre-heater |
| CN204201882U (en) * | 2014-10-30 | 2015-03-11 | 南通万达锅炉有限公司 | Manhole inspection door device |
| CN205188328U (en) * | 2015-10-21 | 2016-04-27 | 江苏瑞帆节能科技服务有限公司 | Blast furnace gas bag collector quick -opening manhole |
| CN205368246U (en) * | 2016-02-17 | 2016-07-06 | 宣化钢铁集团有限责任公司 | Chute manhole cover in middle of ability quick assembly disassembly's dry coke quenching |
| CN106066037A (en) * | 2016-06-30 | 2016-11-02 | 兖州煤业股份有限公司 | A kind of boiler smoke wind system leak source method for blocking and a kind of boiler plugging device |
| CN207713755U (en) * | 2018-01-16 | 2018-08-10 | 河北天柱钢铁集团有限公司 | A kind of device improving blast furnace filtering coal gas babinet Manhole Sealing Joints effect |
| CN212867320U (en) * | 2020-06-29 | 2021-04-02 | 中石化江汉石油工程有限公司环保技术服务公司 | Square manhole door |
Non-Patent Citations (1)
| Title |
|---|
| 煤炭工业职业技能鉴定指导中心编写.《主提升机操作工 初级、中级、高级》.煤炭工业出版社,2017,第205页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114198500A (en) | 2022-03-18 |
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