CN206001183U - Manhole cover - Google Patents
Manhole cover Download PDFInfo
- Publication number
- CN206001183U CN206001183U CN201620796940.0U CN201620796940U CN206001183U CN 206001183 U CN206001183 U CN 206001183U CN 201620796940 U CN201620796940 U CN 201620796940U CN 206001183 U CN206001183 U CN 206001183U
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- manhole
- lower cover
- annular slab
- cover
- pipeline
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Abstract
This utility model discloses a kind of manhole cover, uses, including upper cover plate and lower cover, connected by annular slab between upper cover plate and lower cover in the special manhole of cleaning effusion meter；The cross section of described lower cover is arc, and its radian is identical with pipeline, and lower cover is coordinated with manhole, and described annular slab is made up of steel pipe；Described upper cover plate is blank flange, and blank flange is welded as a whole with annular slab.This utility model provide manhole cover, cleaning effusion meter special manhole in use, prevent inner-walls of duct from changing it is ensured that effusion meter detection accuracy, it is to avoid fire operation, shorten the repair time.
Description
Technical field
This utility model is related to a kind of manhole cover, belongs to mechanical field.
Background technology
Gas flow meter is for the capital equipment to calorific value of gas proportioning and flow measurement, but in process of production, often
Every certain time, because of the reason such as tar, naphthalene slag contained by coal gas, can be attached on effusion meter tube wall and cause effusion meter aperture to diminish,
Or blocking, affects effusion meter value of feedback accuracy, so that gas proportion is changed, or traffic statistics are inaccurate, to next work
Sequence steel products, impact.Specified according to Machinery Ministry standard, before effusion meter is installed, straight length is at least 10 times（Effusion meter）Pipe
Footpath, counts from effusion meter upstream flange end face, at least 5 times of rear straight length（Effusion meter）Caliber.Therefore effusion meter fettler is made
For a difficult problem.
Originally our factory prune job mode is：
1. pair gas piping carries out perforate operation：Using gas welding carry out cut perforate, reuse after cleaning electric welding carry out extensive
Multiple welding.For ensureing safety in scale removal process, need for a long time gas piping is carried out with purging displacement.Cutting and welding process
In, tar and naphthalene slag in the pipeline that also easily ignites, there is firing accident.
2., from entering in pipeline apart from the nearest manhole of effusion meter, implement operation.Need also exist for pipeline is carried out for a long time
Nitrogen, air displacement, personnel enter construction in pipeline, belong to confined space operation, and danger coefficient is equally multiplied.
Content of the invention
This utility model provides a kind of manhole cover, uses, prevent inner-walls of duct from sending out in the special manhole of cleaning effusion meter
Changing it is ensured that effusion meter detection accuracy, it is to avoid fire operation, shorten the repair time.
The technical solution adopted in the utility model is：
A kind of manhole cover, for clearing up in the manhole of pipeline flowmeter, including upper cover plate and lower cover, upper cover plate and lower cover
Connected by annular slab between plate；The cross section of described lower cover is arc, and its radian is identical with pipeline, and lower cover is joined with manhole
Close, described annular slab is made up of steel pipe；Described upper cover plate is blank flange, and blank flange is welded as a whole with annular slab.
In such scheme, described lower cover is the circular arc plate being fabricated to according to the flexibility of pipeline, and it is interior with pipeline
Wall seamlessly transits, and described annular slab and lower cover are welded as a whole.
In such scheme, described upper cover plate is provided with handle.
In such scheme, the internal diameter of described annular slab is 500mm, and lower cover is equivalently-sized with manhole, lower cover straight
Footpath is 600mm.
The manhole cover that this utility model provides, for clearing up in the manhole of effusion meter, the beneficial effect brought：
1）Make inside manhole and plug in pipe bending degree identical, after ensureing that manhole is installed, complete with inner-walls of duct
U.S. laminating.
2）Fire operation when the method can effectively prevent coke gas flow meter from removing contamination.
3）The method makes simply, can effectively shorten the repair time, reduces the cost of overhaul and uses.
With reference to the accompanying drawings and examples this utility model is described further.
Brief description
Fig. 1 is the perspective view of this utility model manhole cover.
Fig. 2 is the front view of this utility model manhole cover.
Fig. 3 is the annexation figure of this utility model manhole cover and pipeline.
In figure 1 is upper cover plate, and 2 is lower cover, and 3 is annular slab, and 4 is handle, and 5 is pipeline.
Specific embodiment
Embodiment：
As shown in Fig. 1 ~ 3, a kind of manhole cover, for clearing up in the manhole of effusion meter, including upper cover plate 1 and lower cover 2, on
Connected by annular slab 3 between cover plate 1 and lower cover 2；The cross section of described lower cover 2 is arc, and its radian is identical with pipeline,
Lower cover 2 is made up of steel pipe with manhole cooperation, described annular slab 3；Described upper cover plate 1 be blank flange, blank flange with annular
Plate 3 is welded as a whole.
In such scheme, described lower cover 2 is the circular arc plate being fabricated to according to the flexibility of pipeline, and it is interior with pipeline
Wall seamlessly transits, and described annular slab 3 and lower cover 2 are welded as a whole.
In such scheme, described upper cover plate is provided with handle.
Further, the internal diameter of described annular slab is 500mm, and lower cover is equivalently-sized with manhole, the diameter of lower cover
For 600mm.
Specifically manufacture method is：
This utility model devises a kind of special manhole cover, using in the manhole of cleaning effusion meter, according to pipeline curvature
Make lower cover to be welded as a whole by annular slab with upper cover plate, after installation, lower cover is fitted with inner-walls of duct, form one
Overall curved surface, prevents air-flow from changing.Manhole cover and manhole use bolt fastening or remove simultaneously, using appointing of usually using
A kind of what flange gasket is sealed, and can avoid fire operation.This manhole is installed at effusion meter two side ducts about 500mm, passes through
Manhole, maintainer can be convenient to use Work tool directly effusion meter is carried out checking, deashing operation.
Claims (4)
1. manhole cover it is characterised in that：Including upper cover plate and lower cover, connected by annular slab between upper cover plate and lower cover；
The cross section of described lower cover is arc, and its radian is identical with pipeline, and lower cover is coordinated with manhole, and described annular slab is by steel pipe
Become；Described upper cover plate is blank flange, and blank flange is welded as a whole with annular slab.
2. manhole cover according to claim 1 it is characterised in that：Described lower cover is to be fabricated to according to the flexibility of pipeline
Circular arc plate, its interior walls be smooth transition with pipeline, described annular slab and lower cover are welded as a whole.
3. manhole cover according to claim 1 it is characterised in that：Described upper cover plate is provided with handle.
4. manhole cover according to claim 1 it is characterised in that：The internal diameter of described annular slab is 500mm, lower cover and people
Equivalently-sized, a diameter of 600mm of lower cover in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620796940.0U CN206001183U (en) | 2016-07-27 | 2016-07-27 | Manhole cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620796940.0U CN206001183U (en) | 2016-07-27 | 2016-07-27 | Manhole cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206001183U true CN206001183U (en) | 2017-03-08 |
Family
ID=58201298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620796940.0U Active CN206001183U (en) | 2016-07-27 | 2016-07-27 | Manhole cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206001183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671363A (en) * | 2019-10-28 | 2020-01-10 | 中交疏浚技术装备国家工程研究中心有限公司 | Dredging pump cavity inspection cover and inlet and outlet method thereof |
-
2016
- 2016-07-27 CN CN201620796940.0U patent/CN206001183U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671363A (en) * | 2019-10-28 | 2020-01-10 | 中交疏浚技术装备国家工程研究中心有限公司 | Dredging pump cavity inspection cover and inlet and outlet method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |