CN216976058U - Manhole structure of reformer cold wall pipe - Google Patents
Manhole structure of reformer cold wall pipe Download PDFInfo
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- CN216976058U CN216976058U CN202123413404.8U CN202123413404U CN216976058U CN 216976058 U CN216976058 U CN 216976058U CN 202123413404 U CN202123413404 U CN 202123413404U CN 216976058 U CN216976058 U CN 216976058U
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Abstract
The utility model discloses a manhole structure of a reformer cold wall pipe, which comprises a flange welded on a manhole cone, wherein the flange is fixedly connected with the manhole cover in a sealing way, the inner side of the flange is fixedly connected with a ring plate arranged at an interval with the manhole cover, the inner walls of the manhole cone and a cold wall pipe cylinder body connected with the manhole cone are fixedly connected with an annular first heat insulation layer, the inner diameter of the first heat insulation layer is equal to that of the flange, an annular second heat insulation layer is fixedly connected in the first heat insulation layer, the front end of the second heat insulation layer is contacted with the ring plate, the inner diameter of the second heat insulation layer is equal to that of the ring plate, a heat insulation material is filled between the manhole cover and the ring plate, a plug assembly is inserted in the second heat insulation layer and comprises a cylindrical plug short section which is filled with a heat insulation material, the rear end baffle is fixed at the rear end of the short section, and a front end baffle with an inner hole is fixed at the front end, the front baffle is positioned between the manhole cover and the ring plate, and a pressure plate is fixed on the front baffle.
Description
Technical Field
The utility model relates to a manhole structure of a cold wall pipe of a converter, belonging to the field of converters in the petrochemical industry.
Background
In the petrochemical industry, the reformer cold-wall tube is one of the central components in the reformer, and its main function is to collect the reformed gas in the reformer tube and deliver it to downstream process equipment. Because the converted gas is high-temperature and medium-pressure gas, the cold wall pipe is important and special-considered high-temperature, medium-pressure, hydrogen-contacting and horizontal cylindrical pressure-bearing equipment. The manhole at the end of the cold wall pipe is arranged to facilitate lining construction and later inspection personnel to enter the interior of the container for maintenance and repair. Manhole structure if the design is improper, the heat can be followed the manhole and lost, causes the local overtemperature of equipment casing, and casing intensity can't obtain guaranteeing, and simultaneously, thermal scattering and disappearing has reduced the thermal efficiency of heating furnace, leads to reformer ambient temperature to rise, has increased the risk of incident such as operating personnel scald, is unfavorable for the safe operation of reformer. The cold wall pipe manhole in the prior art has poor heat insulation performance, is easy to cause overhigh temperature during use, is inconvenient to install and disassemble, and is not beneficial to overhaul and maintenance.
Disclosure of Invention
The utility model aims to provide a manhole structure of a cold wall pipe of a converter, which is used for solving the technical problems of poor heat insulation performance of the manhole of the cold wall pipe and inconvenience in mounting and dismounting the manhole in the prior art.
The utility model adopts the following technical scheme: a manhole structure of a reformer cold wall pipe comprises a flange welded on a manhole cone, wherein the flange is fixedly connected with the manhole cover in a sealing manner, the manhole cover is fixedly connected with the flange through a fastener, the inner side of the flange is fixedly connected with a ring plate arranged at an interval with the manhole cover, the inner wall of the manhole cone and a cold wall pipe barrel body connected with the manhole cone is fixedly connected with an annular first heat insulation layer, the inner diameter of the first heat insulation layer is equal to that of the flange, an annular second heat insulation layer is fixedly connected in the first heat insulation layer, the front end of the second heat insulation layer is in contact with the ring plate, the inner diameter of the second heat insulation layer is equal to that of the ring plate, a heat insulation material is filled between the manhole cover and the ring plate, a plug assembly is inserted in the second heat insulation layer and comprises a cylindrical plug, a short section is filled with the heat insulation material, and the rear end of the plug is fixedly sealed with a rear end baffle, the front end of the plug short section is fixedly provided with a front end baffle with an inner hole, the front end baffle is positioned between the manhole cover and the ring plate, the front end baffle is fixedly connected with a pressing plate which is in contact with the manhole cover, and the pressing plate is used for pressing heat insulation materials in the plug short section.
The outer diameter of the front end baffle is larger than that of the plug short section, and the inner diameter of the front end baffle is smaller than that of the plug short section.
The heat insulation materials on the two sides of the front end baffle are different, the heat insulation material between the front end baffle and the manhole cover is mullite fiber, and the heat insulation material between the front end baffle and the annular plate is a ceramic fiber blanket.
The outer diameter of the front end baffle is 30mm larger than the outer diameter of the plug short section, the inner diameter of the front end baffle is 30mm smaller than the inner diameter of the plug short section, and the outer diameter of the plug short section is 2mm smaller than the inner diameter of the second heat insulation layer.
The clamp plate is of a long strip-shaped structure, two ends of the clamp plate are welded on the front end baffle, and the length of the clamp plate is equal to the outer diameter of the plug short section.
The heat insulation material in the plug short section is a ceramic fiber blanket.
The first heat-insulating layer is a light castable layer.
The second heat insulation layer is a corundum castable layer.
And a sealing gasket is arranged between the manhole cover and the flange.
The central part of the outer side of the manhole cover is provided with a handle, and the upper part of the circumference of the manhole cover is provided with a lifting hook.
The utility model has the beneficial effects that: the plug assembly capable of being independently extracted is arranged in the manhole, so that the installation and the replacement are convenient, meanwhile, the plug assembly and the manhole cover are not welded, so that the opening space of the manhole cover is larger, and the requirement of freely opening the manhole cover can be met; when the plug assembly is in a use state, the sealing performance between the manhole plug and the inner side of the peripheral lining can be improved by utilizing the thrust transmitted by the manhole cover; the plug assembly is of a hollow cylindrical structure, the periphery of the plug assembly can be sealed by steel plates, and the formed integral structure is good in rigidity, strong in stability and excellent in bearing capacity; the thermal insulation material that fills of end cap subassembly and the thermal insulation material that the annular space between flange internal surface and the end cap subassembly and between manhole cover and the crown plate was filled for heat in the cold wall pipe is difficult to spill over, has guaranteed effectively that the reborner is in adiabatic space, has reduced the loss of energy, has avoided the overheated of manhole cover and casing, has guaranteed the safe operation of reborner, has improved the security of operating personnel at the work, has higher practicality. The utility model solves the technical problem of overhigh temperature at the manhole of the cold wall pipe of the converter, and has convenient installation and easy disassembly.
Drawings
FIG. 1 is a schematic view of a reformer cold wall tube manhole structure according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the plug assembly of FIG. 1;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a partially enlarged view of fig. 1.
In the figure: 1-a manhole cover, 2-a fastener, 3-a sealing gasket, 4-a flange, 5-a manhole cone, 6-a cold wall pipe cylinder, 7-a first heat-insulating layer, 8-a second heat-insulating layer, 9-a ceramic fiber blanket, 10-a plug component, 11-a ring plate, 12-mullite fiber, 101-a plug pressing plate, 102-a front end baffle, 103-a plug short joint and 104-a rear end baffle.
Detailed Description
The technical solutions in the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The structure of an embodiment of the utility model is shown in fig. 1, and the manhole structure of the reformer cold wall pipe of the embodiment comprises a flange 4 welded on a manhole cone 5, wherein a manhole cover 1 is fixedly connected to the flange 4 in a sealing manner, the manhole cover 1 and the flange 4 are fixedly connected through a fastener 2, and a sealing gasket 3 is arranged between the manhole cover 1 and the flange 4. The central part of the outer side of the manhole cover 1 is provided with a handle, and the upper part of the periphery of the manhole cover 1 is provided with a lifting hook. The cold wall pipe cylinder body 6 is fixedly connected with the manhole cone 5 through welding.
The flange inner side fixedly connected with and manhole cover interval ring plate that sets up, fixedly connected with annular first insulating layer 7 on manhole cone 5 and the cold wall pipe barrel 6 inner wall of being connected with manhole cone 5, the internal diameter of first insulating layer 7 equals with the internal diameter of flange 4, fixedly connected with annular second insulating layer 8 in the first insulating layer 7, first insulating layer 7 is the light pouring bed of material, second insulating layer 8 is the corundum pouring bed of material. The front end of the second heat insulation layer 8 is in contact with the ring plate 11, the inner diameter of the second heat insulation layer 8 is equal to that of the ring plate 11, heat insulation materials are filled between the manhole cover 1 and the ring plate 11, a plug assembly 10 is inserted in the second heat insulation layer 8, as shown in fig. 2 to fig. 3, the plug assembly 10 comprises a cylindrical plug short section 103, heat insulation materials are filled in the plug short section 103, a rear end baffle plate 104 is fixed at the rear end of the plug short section 103 in a sealing mode, a front end baffle plate 102 with an inner hole is fixed at the front end of the plug short section 103, the front end baffle plate 102 is located between the manhole cover 1 and the ring plate 11, a pressing plate 101 in contact with the manhole cover 1 is fixedly connected to the front end baffle plate 102, and the pressing plate 101 is used for pressing the heat insulation materials in the plug short section 103.
The pressing plate 101 is of a long strip-shaped structure, two ends of the pressing plate 101 are welded to the front end baffle plate 102, and the length of the pressing plate 101 is equal to the outer diameter of the plug short section 103. The outer diameter of the front baffle plate 102 is larger than that of the plug short section 103, and the inner diameter of the front baffle plate 102 is smaller than that of the plug short section 103. In this embodiment, the outer diameter of the front baffle 102 is 30mm larger than the outer diameter of the plug sub 103, the inner diameter of the front baffle 102 is 30mm smaller than the inner diameter of the plug sub 103, and the outer diameter of the plug sub 103 is 2mm smaller than the inner diameter of the second heat insulation layer.
The heat insulation material in the plug short section 103 is a ceramic fiber blanket 9. The thermal insulation materials on the two sides of the front baffle 102 are different, as shown in fig. 4, the thermal insulation material between the front baffle 102 and the manhole cover 1 is mullite fiber 12, and the thermal insulation material between the front baffle 102 and the ring plate 11 is ceramic fiber blanket 9.
The ring plate 11 is arranged on the outer side of the plug short section 103 and is not welded with the plug short section 103, a round hole with the inner diameter larger than the outer diameter of the plug short section 103 is formed in the ring plate 11, the inner diameter of the ring plate 11 is 2mm larger than the outer diameter of the plug short section in the embodiment, the plug short section 103 penetrates through the ring plate 11, the outer diameter of the ring plate 11 is 2mm smaller than the inner diameter of the flange 4, and the ring plate 11 is welded with the inner side of the flange 4.
In the plug assembly, after the front end baffle plate 102, the rear end baffle plate 104 and the plug short section 103 are assembled and welded, a heat-insulating material ceramic fiber blanket 9 is filled in a cavity of the whole plug short section, and then a plug pressing plate 101 is welded on the front end baffle plate. After the manhole cone 5, the cold wall pipe barrel 6, the flange 4 and the annular plate 11 are assembled and welded, lining construction in the cold wall pipe shell is firstly carried out, firstly, a heat insulation material light castable is lined on the inner surface of the shell until the inner surface of the light castable 7 is flush with the inner surface of the flange 4, the light castable is used as a first heat insulation layer 7, and then, an assembled and welded plug assembly 11 is arranged. And a heat-insulating material corundum castable is lined between the inner surface of the flange 4 and the outer surface of the plug short section 103, the corundum castable is used as a second heat-insulating layer 8, a cavity between a front end baffle 102 and a ring plate 11 of the plug assembly is filled with a heat-insulating material ceramic fiber blanket 9, and a cavity between the front end baffle 102 and the inner surface of the manhole flange 4 is filled with a heat-insulating material mullite fiber 12.
According to the embodiment of the utility model, the plug assembly capable of being independently extracted is arranged in the manhole, so that the installation and the replacement are convenient, and meanwhile, the plug assembly and the manhole cover are not welded, so that the opening space of the manhole cover is larger, and the requirement of freely opening the manhole cover can be met; when the plug assembly is in a use state, the sealing performance between the plug assembly and the inner side of the peripheral lining can be improved by utilizing the thrust transmitted by the manhole cover; the plug assembly is of a hollow cylindrical structure, the periphery of the plug assembly is sealed by a steel plate, and the formed integral structure is good in rigidity, strong in stability and excellent in bearing capacity; the filling of the heat-insulating lining in the plug assembly and the arrangement of multiple heat-insulating lining materials in the annular space formed between the inner surface of the flange and the manhole plug enable heat in the cold wall pipe to be difficult to overflow, effectively guarantee that the converter is in the heat-insulating space, reduce energy loss, avoid overheating of the manhole cover and the shell, guarantee safe operation of the converter, improve safety of operators in work and have higher practicability.
The above description is directed to the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be easily made by those skilled in the art within the technical scope of the present invention will be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a reborner cold wall pipe manhole structure, its includes the flange of welding on the manhole cone, sealed fixedly connected with manhole cover on the flange, its characterized in that: the manhole cover and the flange are fixedly connected through a fastener, the inner side of the flange is fixedly connected with a ring plate arranged at an interval with the manhole cover, an annular first heat-insulating layer is fixedly connected on the inner wall of a cold-wall pipe barrel body connected with the manhole cone and the inner wall of the cold-wall pipe barrel body connected with the manhole cone, the inner diameter of the first heat-insulating layer is equal to that of the flange, an annular second heat-insulating layer is fixedly connected in the first heat-insulating layer, the front end of the second heat-insulating layer is in contact with the ring plate, the inner diameter of the second heat-insulating layer is equal to that of the ring plate, heat-insulating materials are filled between the manhole cover and the ring plate, a plug assembly is inserted in the second heat-insulating layer and comprises a cylindrical plug short section, heat-insulating materials are filled in the plug short section, a rear end baffle is fixedly sealed at the rear end of the short section, a front end baffle with an inner hole is fixed at the front end of the plug short section, and the front end baffle is positioned between the manhole cover and the ring plate, and the front end baffle is fixedly connected with a pressing plate which is in contact with the manhole cover, and the pressing plate is used for pressing the heat insulation material in the plug short section.
2. The reformer cold wall tube manhole structure of claim 1, wherein: the outer diameter of the front end baffle is larger than that of the plug short section, and the inner diameter of the front end baffle is smaller than that of the plug short section.
3. The reformer cold wall tube manhole structure of claim 2, wherein: the heat insulation materials on the two sides of the front end baffle are different, the heat insulation material between the front end baffle and the manhole cover is mullite fiber, and the heat insulation material between the front end baffle and the annular plate is a ceramic fiber blanket.
4. The reformer cold wall tube manhole structure of claim 2, wherein: the outer diameter of the front end baffle is 30mm larger than the outer diameter of the plug short section, the inner diameter of the front end baffle is 30mm smaller than the inner diameter of the plug short section, and the outer diameter of the plug short section is 2mm smaller than the inner diameter of the second heat insulation layer.
5. The reformer cold wall tube manhole structure of claim 1, wherein: the clamp plate is of a long strip-shaped structure, two ends of the clamp plate are welded on the front end baffle, and the length of the clamp plate is equal to the outer diameter of the plug short section.
6. The reformer cold wall tube manhole structure of claim 1, wherein: the heat insulation material in the plug short section is a ceramic fiber blanket.
7. The reformer cold wall tube manhole structure of claim 1, wherein: the first heat insulation layer is a light castable layer.
8. The reformer cold wall tube manhole structure of claim 1, wherein: the second heat insulation layer is a corundum castable layer.
9. The reformer cold wall tube manhole structure of claim 1, wherein: and a sealing gasket is arranged between the manhole cover and the flange.
10. The reformer cold wall tube manhole structure of claim 1, wherein: the central part of the outer side of the manhole cover is provided with a handle, and the upper part of the circumference of the manhole cover is provided with a lifting hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123413404.8U CN216976058U (en) | 2021-12-31 | 2021-12-31 | Manhole structure of reformer cold wall pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123413404.8U CN216976058U (en) | 2021-12-31 | 2021-12-31 | Manhole structure of reformer cold wall pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216976058U true CN216976058U (en) | 2022-07-15 |
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ID=82349179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123413404.8U Active CN216976058U (en) | 2021-12-31 | 2021-12-31 | Manhole structure of reformer cold wall pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216976058U (en) |
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2021
- 2021-12-31 CN CN202123413404.8U patent/CN216976058U/en active Active
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