CN213839956U - Maintenance flange - Google Patents
Maintenance flange Download PDFInfo
- Publication number
- CN213839956U CN213839956U CN202022870091.8U CN202022870091U CN213839956U CN 213839956 U CN213839956 U CN 213839956U CN 202022870091 U CN202022870091 U CN 202022870091U CN 213839956 U CN213839956 U CN 213839956U
- Authority
- CN
- China
- Prior art keywords
- flange
- degrees
- flange body
- pipeline
- mounting hole
- 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
Images
Abstract
The utility model relates to a natural gas transportation technical field discloses a maintenance flange, including the flange body, the flange body is for being less than 180 fan ring, and the internal diameter of flange body matches with the pipeline external diameter that corresponds, and the external diameter of flange body matches with former flange external diameter on the pipeline, be equipped with at least one mounting hole on the flange body, the mounting hole position on the mounting hole on the flange body and the former flange is corresponding. The utility model discloses press from both sides the damaged part of machine mouthful flange and fill the loss, realize the sealing connection of pipeline.
Description
Technical Field
The utility model relates to a natural gas transportation technical field especially relates to a maintenance flange.
Background
At present, the materials of underground gas pipe network pipelines in Shanghai cities are basically divided into cast iron pipes, steel pipes and PE pipes. The use time span of the cast iron pipe is longest, from the initial grey cast iron pipe to the current nodular cast iron pipe. The pipe joint is also replaced by a mechanical joint which is composed of a machine port flange (a pressure wheel sheet), a rubber ring and a locking ring from the prior socket type. According to the statistics of emergency repair at ordinary times, the leakage of the cast iron pipe is basically concentrated on the interface leakage.
The machine-port flange of a large number of cast iron pipe mechanical interfaces in the pipe network uses grey cast iron, has low strength plasticity and large brittleness, and is easy to break and damage under the action of external forces such as pavement foundation settlement and the like.
The machine port flange is damaged, the time consumption for repairing and replacing the cast iron pipe interface is long, and the steps are multiple. The gas is stopped and the pressure is reduced, which affects the gas use of users. In the existing emergency repair process, a flange sheet of a mechanical interface is repaired and replaced, and emergency repair can be finished only by using flange sheets of 2 sheet interfaces with the same caliber, so that the material cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, provide a maintenance flange, press from both sides the damaged part of machine mouthful flange and fill the loss, realize the sealing connection of pipeline.
The utility model adopts the technical proposal that:
a maintenance flange is characterized by comprising a flange body, wherein the flange body is a sector ring smaller than 180 degrees, the inner diameter of the flange body is matched with the outer diameter of a corresponding pipeline, the outer diameter of the flange body is matched with the outer diameter of an original flange on the pipeline, at least one mounting hole is formed in the flange body, and the mounting hole in the flange body corresponds to the mounting hole in the original flange.
Further, the radian of the flange body is 30 °, 45 °, 60 °, 75 °, 90 °, 105 °, 120 °, 135 °, 150 °, 165 °, or 180 °.
Further, the number of the mounting holes on the flange body is 1 to 3.
The utility model has the advantages that:
(1) the material is saved;
(2) the hole drilling of the rotary holes at two ends is not needed, the gas is diffused, the excavation area of the working pit is reduced, and the road repair expense is reduced;
(3) the leakage of fuel gas is reduced;
(4) the rush-repair time is reduced, and the working efficiency is increased.
Drawings
Fig. 1 to 3 are schematic structural diagrams of several aspects of the present invention;
fig. 4 is an installation diagram of the present invention.
Detailed Description
The following describes in detail a specific embodiment of the maintenance flange according to the present invention with reference to the accompanying drawings.
Referring to the attached drawings 1 to 3, the maintenance flange comprises a flange body 1, the flange body 1 is a sector ring smaller than 180 degrees, the inner diameter of the flange body 1 is matched with the outer diameter of a corresponding pipeline, the outer diameter of the flange body 1 is matched with the outer diameter of an original flange 3 on the pipeline 2, at least one mounting hole 4 is formed in the flange body, and the mounting hole 4 in the flange body 1 corresponds to the mounting hole in the original flange 3.
According to the original flange 3 on different pipelines, the radian of the repair flange body 1 matched with the original flange is generally 30 degrees to 180 degrees, and specifically can include 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, 165 degrees or 180 degrees. The number of the mounting holes 4 on the flange body 1 is 1 to 3.
For an original flange 3 of a small-caliber pipeline, such as a pipeline with DN100-DN300 calibers, a maintenance flange with a smaller radian is used, and after one or two mounting holes on the maintenance flange 1 are matched with mounting holes of an original machine-made flange, the maintenance flange is fastened and fixed with a flange of a butt joint pipe.
Referring to fig. 4, for an original flange 3 of a large-caliber pipeline, such as a pipeline with a caliber of DN500 to DN700, a large-radian maintenance flange is used, and after at least two mounting holes 4 on the flange are matched with mounting holes of the original flange, the flange is fastened and fixed with a flange of a butt joint pipe.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A service flange, comprising: the flange comprises a flange body, wherein the flange body is a sector ring smaller than 180 degrees, the inner diameter of the flange body is matched with the outer diameter of a corresponding pipeline, the outer diameter of the flange body is matched with the outer diameter of an original flange on the pipeline, at least one mounting hole is formed in the flange body, and the mounting hole in the flange body corresponds to the mounting hole in the original flange.
2. A service flange according to claim 1, wherein: the radian of the flange body is 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, 165 degrees or 180 degrees.
3. A service flange according to claim 1, wherein: the number of the mounting holes on the flange body is 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022870091.8U CN213839956U (en) | 2020-12-02 | 2020-12-02 | Maintenance flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022870091.8U CN213839956U (en) | 2020-12-02 | 2020-12-02 | Maintenance flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213839956U true CN213839956U (en) | 2021-07-30 |
Family
ID=76995761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022870091.8U Active CN213839956U (en) | 2020-12-02 | 2020-12-02 | Maintenance flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213839956U (en) |
-
2020
- 2020-12-02 CN CN202022870091.8U patent/CN213839956U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213839956U (en) | Maintenance flange | |
| CN105605351A (en) | Large-caliber T-shaped-port block-cast nodular cast iron pipe fitting | |
| CN107859806B (en) | Embedded pipeline inner support reinforcing system and reinforcing method thereof | |
| CN104455889A (en) | Integrated underground pipe gallery with compensation device | |
| CN207906626U (en) | EXPE steel multiple tubes | |
| CN204533956U (en) | A kind of pipeline leakage plugging device | |
| CN205479852U (en) | Heavy -calibre T type interface block cast nodular cast -iron pipe spare | |
| CN201281184Y (en) | Top pipe deviation rectifying subjoint | |
| CN210462146U (en) | Circular pipeline repairing structure | |
| CN210940437U (en) | Long-range hose expansion device for repairing hose | |
| CN210372529U (en) | Auxiliary anti-falling device for half joint | |
| CN204437568U (en) | Board-like extended pattern pipeline patching device | |
| CN209587479U (en) | A kind of PE device for repairing pipeline | |
| CN204300528U (en) | Glass fiber reinforced plastic sand-inclusion pipeline | |
| CN202834386U (en) | Three-dimensional hyperbolic steel pipe jacking axis formed transitional device | |
| CN203641701U (en) | Lightweight concrete protective wall combined water charging and discharging pipeline | |
| CN206875038U (en) | A kind of automatically walk pipeline rehabilitation device | |
| CN102797921A (en) | Pipeline connecting device | |
| CN214093461U (en) | Anti-drop socket type pipeline unit and pipeline assembled by same | |
| CN215215311U (en) | Nodular cast iron pipe for repairing non-excavation pipeline | |
| CN210571866U (en) | Water supply pipeline water pressure test pressing barrel | |
| CN215410695U (en) | Special-shaped sleeve | |
| CN202769111U (en) | Cement pipe connection structure | |
| CN104806816B (en) | A kind of construction method of push pipe bilayer PE pipes push pipe into cast iron pipe | |
| CN220379033U (en) | Sealing device for preventing water and mud from bursting at pipe jacking hole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |