CN2115442U - Underground metal piping insulating joint - Google Patents
Underground metal piping insulating joint Download PDFInfo
- Publication number
- CN2115442U CN2115442U CN 92204022 CN92204022U CN2115442U CN 2115442 U CN2115442 U CN 2115442U CN 92204022 CN92204022 CN 92204022 CN 92204022 U CN92204022 U CN 92204022U CN 2115442 U CN2115442 U CN 2115442U
- Authority
- CN
- China
- Prior art keywords
- flange
- connecting ring
- right flange
- insulating joint
- metal piping
- 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.)
- Granted
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Abstract
The utility model relates to a cathodic protection device for a metal pipe which conveys the liquid, the gas and the slurry, and the utility model is an underground metal piping insulating joint. The underground metal piping insulating joint comprises a left flange 1, a right flange 8, a sealing ring 6, insulating sealing plates 7 and other elements. A connecting ring 9 is sheathed on the right flange 8, and besides, the connecting ring 9 is fixedly connected with the left flange 1. The insulating sealing plates 7 are arranged between the left flange 1 and the right flange 8 and between the connecting ring 9 and the right flange 8, and a rubber ring 10 and a filler 11 are arranged between the connecting ring 9 and the right flange 8. The underground metal piping insulating joint and transport pipes can be directly buried underground together. The insulation can not fail for the external disturbance, and the underground metal piping insulating joint has extremely favorable bending stiffness, which makes the sealing part not generate the leakage for reason of having no enough bending stiffness when the thermal medium is transported. The utility model has the advantages of small size and convenient installation.
Description
The utility model relates to the metallic pipe cathode protector of carrying liquid, gas and slurries, is a kind of underground metallic conduit insulating joint that is embedded in.
In buried metal pipeline, in order to prevent electrochemical corrosion, will set up a cathodic protection station every tens of kilometers, correspondingly also just need to use a pair of insulating joint, to cut off current path.
In existing technology, in order to cutting off the used insulated flange that is of current path, it is to have installed (as shown in Figure 1) that insulation board 7, felt pad 3 and insulating bush 4 are finished additional on the left flange 1, right flange 8, connecting bolt 2, attaching nut 5, seal ring 6 bases in common Placement.Should be located at the ground and be placed on indoor owing to the reason of constructing has determined this device.Like this, there is following problem in this insulated flange:
1. place on the ground, often cause failure of insulation because of some external interference;
2. when carrying thermal medium,, cause sealing part to leak sometimes because of producing bigger moment of flexure from the elbow heat expansion that is connected with it;
3. be used for higher liquid of discharge pressure or caliber when big, the size of flange is inevitable very big, make and install all compare difficult.
The utility model is exactly functional for overcoming a kind of sealed insulation that above-mentioned shortcoming designs, and size is less, and can be embedded in underground metallic conduit insulating joint.
Task of the present utility model realizes as follows: thisly be embedded in underground metallic conduit insulating joint, comprise elements such as left flange 1, right flange 8, seal ring 6, insulated enclosure plate 7, on right flange 8, be set with connecting ring 9, and connecting ring 9 is fixedlyed connected with left flange 1, between left side flange 1 and right flange 8, connecting ring 9 and the right flange 8 insulated enclosure plate 7 is housed, rubber ring 10 and filler 11 also are housed between connecting ring 9 and right flange 8.
This inside and outside wall that is embedded in left flange 1, right flange 8 and the connecting ring 9 of underground metallic conduit insulating joint is all smeared the anti-corrosion insulation coating.
The utility model description of drawings is as follows:
Fig. 1 is a common metal pipe-line wrapping joint structure schematic representation;
Fig. 2 can be embedded in underground metallic conduit insulating joint structural representation.
Describe the utility model in detail below in conjunction with accompanying drawing.Can be embedded in underground metallic conduit insulating joint is a non-removable integral body, and it is made up of elements such as left flange 1, connecting ring 9, seal ring 6, insulated enclosure plate 7, rubber ring 10, filler 11 and right flanges 8.Left side flange 1, right flange 8 and connecting ring 9 are formed the skeleton of insulating joint.After inner each part installs, connecting ring 9 and left flange 1 are welded, make insulating joint be linked to be a non-removable integral body.The end of a left side flange 1 and right flange 8 directly connects with under ground piping, is keeping under the continuous and constant situation of transfer passage, with the pipe-line wrapping isolation of pipeline and its right-hand member of its left end.
Seal ring 10 is " O " RunddichtringOs, and it is the primary seal of this insulating joint.The material that can Gong select for use has neoprene, fluorine rubber, silicone rubber and nitrile butadiene rubber etc.According to service condition, be advisable to select nitrile butadiene rubber.Installing insulated enclosure plate 7 between left flange 1 and the right flange 8 and between right flange 8 and the connecting ring 9.These two insulated enclosure plates provide the main unit of insulation, also provide the auxiliary element of sealing.The material of insulated enclosure plate should be the higher insulating material of compressive strength, is good with 3204 epoxy phenolic laminated glass fabric plates especially.Installing seal ring 10 and perfusion packing 11 in the annular space of right flange 8 and connecting ring 9.Seal ring 10 and packing 11 are the auxiliary elements that are used to insulate, and packing 11 has concurrently simultaneously and prevents to bury the dirty effect of invading joint inside of water in the soil behind the ground.Seal ring 10 uses ordinary rubber to get final product.Packing 11 can be " rubber cement ", also can be epoxy resin.
Consider the effect of fed sheet of a media and the corrosion that external environment condition may cause, the inside and outside wall of this insulating joint is all smeared the anti-corrosion insulation coating.The material of coating is bituminous epoxy, chlorosulfonated polyethylene or epoxy resin.
The utility model is not axially staying any gap when assembling left flange 1, connecting ring 9, insulated enclosure plate 7 and right flange 8.So, after welding " attachment weld ", will inevitably cause the welding pressure stress (axial stress that belongs to secondary stress character) that is equivalent to connecting ring 9 material yield intensity, all Sealings tightly are compressed.Even when the normal conveying or the hydrostatic test, pressure medium also can not " strut these sealing surfaces ", therefore sealing is very reliable.
The utility model does not need bolt to connect, and therefore the size of left flange 1 and right flange 8 is of a size of little more than used in the past insulated flange.
Major advantage of the present utility model is:
1. can directly be embedded in conveyance conduit undergroundly, can not disturb because of the outside and make failure of insulation;
2. bending rigidity is fabulous, and the sealing of three roads is arranged, even carry thermal medium also can not leak because bending rigidity causes sealing place not enough;
3. size is little, is convenient to make and install.
Claims (2)
1, a kind ofly is embedded in underground metallic conduit insulating joint, comprises left flange 1, right flange 8, seal ring 6, insulated enclosure plate 7, it is characterized in that: be set with connecting ring 9 and connecting ring 9 on the right flange 8 and fixedly connected with left flange 1; Between left side flange 1 and right flange 8, connecting ring 9 and the right flange 8 insulated enclosure plate 7 is housed; Rubber ring 10 and filler 11 also are housed between connecting ring 9 and right flange 8.
2, a kind of underground metallic conduit insulating joint that is embedded in according to claim 1, it is characterized in that: the inside and outside wall at left flange 1, right flange 8 and connecting ring 9 is all smeared the anti-corrosion insulation coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92204022 CN2115442U (en) | 1992-03-12 | 1992-03-12 | Underground metal piping insulating joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92204022 CN2115442U (en) | 1992-03-12 | 1992-03-12 | Underground metal piping insulating joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2115442U true CN2115442U (en) | 1992-09-09 |
Family
ID=4950521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92204022 Granted CN2115442U (en) | 1992-03-12 | 1992-03-12 | Underground metal piping insulating joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2115442U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460735C (en) * | 2006-07-12 | 2009-02-11 | 苏州市燃气设备阀门制造有限公司 | Insulated metal valve |
-
1992
- 1992-03-12 CN CN 92204022 patent/CN2115442U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460735C (en) * | 2006-07-12 | 2009-02-11 | 苏州市燃气设备阀门制造有限公司 | Insulated metal valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |