CN215674026U - Anticorrosive seal structure of butt welding formula plastic-lined steel pipe - Google Patents
Anticorrosive seal structure of butt welding formula plastic-lined steel pipe Download PDFInfo
- Publication number
- CN215674026U CN215674026U CN202122227802.4U CN202122227802U CN215674026U CN 215674026 U CN215674026 U CN 215674026U CN 202122227802 U CN202122227802 U CN 202122227802U CN 215674026 U CN215674026 U CN 215674026U
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- steel pipe
- lining
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- metal
- plastic layer
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 60
- 239000010959 steel Substances 0.000 title claims abstract description 60
- 238000003466 welding Methods 0.000 title claims description 32
- 239000002184 metal Substances 0.000 claims abstract description 55
- 239000004033 plastic Substances 0.000 claims abstract description 50
- 229920003023 plastic Polymers 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000005493 welding type Methods 0.000 claims abstract description 4
- 238000005260 corrosion Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- -1 Polyethylene Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
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- Arc Welding In General (AREA)
Abstract
The utility model provides an anticorrosive sealing structure of butt welding type plastic lining steel pipes, belonging to the technical field of pipeline and accessory manufacturing, comprising: the steel pipe, the inner circle of steel pipe is provided with inside lining plastic layer, still includes: the steel pipe comprises a metal bushing and a sealing rubber strip, wherein one end of the metal bushing extends into the steel pipe, the edge of the other end of the metal bushing is welded with the end of the steel pipe, a circle of inward concave clamping groove which is inward concave towards the radial center is arranged in the middle of the metal bushing, the sealing rubber strip is filled between the inward concave clamping groove and a lining plastic layer, and the surface of an outer ring of the metal bushing is tightly attached to the surface of an inner ring of the lining plastic layer. The metal bushing is expanded to be tightly pressed with a lining plastic layer in the lining plastic steel pipe through a special pipe expander inside the bushing, and meanwhile, a rubber sealing rubber strip attached to the metal bushing is also compressed and attached to obtain an effective sealing structure.
Description
Technical Field
The utility model relates to the technical field of pipeline and accessory manufacturing, in particular to an anti-corrosion sealing structure of a butt-welding type plastic lining steel pipe.
Background
The plastic-lined steel pipe is produced with seamless galvanized steel pipe and welded steel pipe as base pipe and through eliminating welding rib and lining with food level Polyethylene (PE) pipe. Traditional lining is moulded steel pipe and is moulded steel pipe to butt welding formula lining and install the effect that metal protection bush played protection port polyethylene plastic layer additional at the port usually, but metal bush and steel pipe end fixing usually to effectively laminating the plastic layer not for metal bush and plastic layer are gapped between the layer, have to reveal sealed problem and plastic layer tip bonding department corrosion problem. Patent No. CN201520872353.0 is a plastic bush structure of a flange-connected plastic-lined steel pipe in engineering field, which is to fix the plastic bush and the plastic-lined steel pipe by means of bonding to form a seal. However, the operation of forming the adhesive seal by using the adhesive is troublesome and the structural stability of the plastic bushing is poor, so that the practicability is low.
SUMMERY OF THE UTILITY MODEL
The utility model can provide an anti-corrosion sealing structure for the traditional butt welding type plastic lining steel pipe with a stainless steel lining, wherein a sealing rubber strip is additionally arranged on a metal lining, the structure part can be pressed and tightly attached to a lining plastic layer, and a conveying fluid body can not enter a pipe port layer through a gap between the stainless steel lining and the lining plastic layer through the sealing strip, so that an effective full-anti-corrosion sealing structure is obtained, and the existing problems are solved.
The embodiment of the utility model is realized by the following technical scheme:
the utility model provides an anticorrosive seal structure of butt welding formula lining plastic steel pipe, includes: the steel pipe, be provided with inside lining plastic layer on the inner circle of steel pipe, still include: the steel pipe sealing structure comprises a metal bushing and a sealing rubber strip, wherein one end of the metal bushing extends into the steel pipe, the edge of the other end of the metal bushing is welded with the end portion of the steel pipe, a circle of inward concave clamping groove which is inward concave towards the radial center is formed in the middle of the metal bushing, the sealing rubber strip is filled between the inward concave clamping groove and a lining plastic layer, and the surface of an outer ring of the metal bushing is tightly attached to the surface of an inner ring of the lining plastic layer.
Furthermore, the end part of the steel pipe is provided with a welding groove which inclines towards the center in the radial direction, a welding zone is arranged between the end part of the welding groove and the metal lining, and the welding zone is full-length welding.
Furthermore, a gap is reserved between the inner lining plastic layer in the steel pipe and the end part of the steel pipe.
Further, the metal lining sleeve is divided into an inclined plane flaring section and a flat straight section along the axial direction, the inclined plane flaring section is connected with the end part of the steel pipe to the surface of the inner ring of the end part of the lining plastic layer and is in an inclined shape, and the middle part of the flat straight section is provided with an inwards concave clamping groove.
Furthermore, the metal lining is made of stainless steel.
Further, the metal lining is tightly attached to the lining plastic layer through an expansion process from the center to the outer ring.
The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:
this anticorrosive seal structure of butt welding formula lining plastic steel pipe uses the metal bush to install joint strip's seal structure additional, the tip and the steel pipe tip welding of metal bush, inside the bush makes metal bush inflation and the inseparable pressfitting of lining plastic layer in the lining plastic steel pipe through special pipe expander, make the subsidiary rubber joint strip of metal bush also compress and laminate between lining plastic layer and metal bush draw-in groove simultaneously, obtain effectual seal structure, the seal structure formation process is simple and not time-consuming and the structure is solid reliable, the butt welding operation of also being convenient for.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Icon: 1-steel pipe, 2-metal lining, 3-lining plastic layer, 4-concave clamping groove, 5-sealing rubber strip, 6-welding groove, 7-welding zone, 8-spacing gap, 201-inclined plane flaring section, 202-straight section
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Referring to fig. 1, the following further illustrates, with reference to a specific embodiment, an anticorrosion sealing structure of a butt-welded plastic-lined steel pipe 1, including: the sealing structure comprises a steel pipe 1, a metal bushing 2 and a sealing rubber strip 5, wherein a lining plastic layer 3 is arranged on an inner ring of the lining plastic steel pipe 1, effective sealing can be formed between the plastic layer and the end part of the steel pipe 1, one end of the metal bushing 2 extends into the steel pipe 1, the edge of the other end of the metal bushing 2 is welded with the end part of the steel pipe 1, a circle of inward concave clamping grooves 4 which are inward concave towards the radial center are formed in the middle of the metal bushing 2, the sealing rubber strip 5 is filled between the inward concave clamping grooves 4 and the lining plastic layer 3, and the surface of an outer ring of the metal bushing 2 can be tightly attached to the surface of the inner ring of the lining plastic layer 3. The metal bushing 2 makes the metal bushing 2 and the lining plastic layer 3 tightly attached through the expanding process from the center to the outer ring, and simultaneously makes the rubber sealing rubber strip 5 attached to the metal bushing 2 also compressed and attached between the lining plastic layer and the metal bushing 2 clamping groove, so as to obtain an effective sealing structure. Because the metal lining 2 is made of stainless steel, a special pipe expander is needed to achieve a strong expansion extrusion effect, the basic action of the expansion extrusion is also expansion extrusion, and the expansion extrusion is easy to realize. The butt welding connection structure adopts the metal lining 2, which greatly enhances the connection strength.
In order to meet the requirements of a welding process, the end part of the steel pipe 1 is provided with a welding groove 6 which inclines towards the radial center, a welding zone 7 is arranged between the end part of the welding groove 6 and the metal lining 2, the welding zone 7 is full-welded, the structure is stable, and the sealing performance is further enhanced. The inside lining plastic layer 3 in the steel pipe 1 leaves interval space 8 to the tip of steel pipe 1 between, and lining plastic layer 3 does not extend to steel pipe 1 tip very much, because 1 tip of steel pipe will weld metal bush 2, will produce high temperature during the welding, avoids high temperature to influence inside lining plastic layer 3.
The metal bushing 2 is divided into an inclined plane flaring section 201 and a straight section 202 along the axial direction, the inclined plane flaring section 201 is connected with the end part of the steel pipe 1 to the surface of the inner ring of the end part of the lining plastic layer 3 and is inclined when seen from the cross section, and the middle part of the straight section 202 is provided with an inwards concave clamping groove 4. The straight section 202 is the location of the expansion extrusion.
The installation process of the utility model is as follows: sealing rubber strip 5 overlaps earlier in indent draw-in groove 4, 2 one ends of metal bush stretch into in steel pipe 1, then the outer end edge and the 1 tip full weld welding of steel pipe of metal bush 2, stretch into metal bush 2 by dedicated bloated pressure ware again at last then the inflation extrusion, make metal bush 2 hug closely with inside lining plastic layer 3, make the rubber sealing rubber strip 5 subsidiary of metal bush 2 also compress and laminate between inside lining plastic layer and 2 draw-in grooves of metal bush simultaneously, obtain effectual seal structure, the seal structure formation process is simple and does not take time and the structure is solid reliable, the butt welding operation of also being convenient for.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention, which is defined by the appended claims and their equivalents.
Claims (6)
1. The utility model provides an anticorrosive seal structure of butt welding formula lining plastic steel pipe, includes: steel pipe (1), be provided with inside lining plastic layer (3) on the inner circle of steel pipe (1), its characterized in that still includes: metal bush (2) and joint strip (5), the one end of metal bush (2) stretches into in steel pipe (1), the edge of the other end of metal bush (2) and the tip welding of steel pipe (1), the middle part of metal bush (2) is provided with indent draw-in groove (4) of round towards radial center indent, it has joint strip (5) to fill between inside lining plastic layer (3) in indent draw-in groove (4), the outer lane surface of metal bush (2) is hugged closely in the inner circle surface of inside lining plastic layer (3).
2. The anti-corrosion sealing structure of the butt-welded plastic-lined steel pipe according to claim 1, wherein the end part of the steel pipe (1) is provided with a welding groove (6) which is inclined towards the radial center, a welding zone (7) is arranged between the end part of the welding groove (6) and the metal lining (2), and the welding zone (7) is full-weld.
3. The anti-corrosion sealing structure of the butt-welding plastic-lined steel pipe (1) according to claim 1, characterized in that a spacing gap (8) is reserved between the lining plastic layer (3) in the steel pipe (1) and the end part of the steel pipe (1).
4. The anti-corrosion sealing structure of the butt-welding plastic-lined steel pipe according to claim 1, wherein the metal bushing (2) is axially divided into an inclined surface flaring section (201) and a flat section (202), the inclined surface flaring section (201) is connected with the end part of the steel pipe (1) to the surface of the inner ring of the end part of the plastic lining layer (3) and is inclined, and the middle part of the flat section (202) is provided with an inwards concave clamping groove (4).
5. The anti-corrosion sealing structure of the butt-welding type plastic-lined steel pipe according to claim 1, wherein the metal bushing (2) is made of stainless steel.
6. The anti-corrosion sealing structure of the butt-welding lining plastic steel pipe according to claim 1, wherein the metal lining (2) is tightly attached to the lining plastic layer (3) through an expansion process from the center to the outer ring of the metal lining (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122227802.4U CN215674026U (en) | 2021-09-14 | 2021-09-14 | Anticorrosive seal structure of butt welding formula plastic-lined steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122227802.4U CN215674026U (en) | 2021-09-14 | 2021-09-14 | Anticorrosive seal structure of butt welding formula plastic-lined steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215674026U true CN215674026U (en) | 2022-01-28 |
Family
ID=79963402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122227802.4U Active CN215674026U (en) | 2021-09-14 | 2021-09-14 | Anticorrosive seal structure of butt welding formula plastic-lined steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215674026U (en) |
-
2021
- 2021-09-14 CN CN202122227802.4U patent/CN215674026U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230515 Address after: No. 139, Xiangyang Road, Qingbaijiang District, Chengdu, Sichuan 610300 Patentee after: Chengdu joint pipe manufacturing Co.,Ltd. Address before: 611330 No. 1, Section 2, Industrial Avenue, Jinyuan Town, Dayi County, Chengdu City, Sichuan Province Patentee before: Chengdu Common Steel and Plastic Products Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240418 Address after: No. 1-2, Section 1, Xueshan Avenue, Qingxia Street, Dayi County, Chengdu City, Sichuan Province, 610000 Patentee after: Chengdu Beixing Pipe Industry Co.,Ltd. Country or region after: China Address before: No. 139, Xiangyang Road, Qingbaijiang District, Chengdu, Sichuan 610300 Patentee before: Chengdu joint pipe manufacturing Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |