CN203189893U - Plastic coated reinforcement rib spiral steel pipe for underground coal mine - Google Patents
Plastic coated reinforcement rib spiral steel pipe for underground coal mine Download PDFInfo
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- CN203189893U CN203189893U CN 201320209492 CN201320209492U CN203189893U CN 203189893 U CN203189893 U CN 203189893U CN 201320209492 CN201320209492 CN 201320209492 CN 201320209492 U CN201320209492 U CN 201320209492U CN 203189893 U CN203189893 U CN 203189893U
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- steel pipe
- rib
- spiral
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- plastic coated
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Abstract
Provided is a plastic coated reinforcement rib spiral steel pipe for an underground coal min. A steel pipe is provided with reinforcement ribs which are distributed in a spiral mode, the outer surface and the inner surface of the steel pipe are provided with an outer wall plastic coated layer and an inner wall plastic coated layer respectively, the outer wall plastic coated layer and the inner wall plastic coated layer are resistant to flame and static, and the steel pipe is formed by a steel belt in a spiral rolling and welded mode. A certain angel is formed between each reinforcement rib and the axis of the steel pipe, and the reinforcement ribs are arranged at equal intervals. The reinforcement ribs and the steel pipe are integrally formed in a cold press molding mode, and alternatively, the formed reinforcement ribs are welded on the outer surface of the steel pipe. The plastic coated reinforcement rib spiral steel pipe is light in weight of unit length, and has good flame, static and negative pressure resistant performance.
Description
Technical field
The utility model relates to a kind of metal pipe, is mainly used in ventilation, the draining of the conveying of fluid, particularly tunnel or mine, is specially the underground mine use plastic-coated enhancing rib Spiral Steel Pipe that a kind of coal-seam gas is used.
Background technique
In recent years, unconventional rock gas (coal-seam gas, shale gas, gas hydrates etc.) more and more comes into one's own in the world, and along with technological innovation and application, the energy demand of the U.S. 81% can be self-sufficient, and being through with relies on the period of energy import.And the unconventional natural gas extraction of China with utilize technology at the early-stage, the reserves of China's coal-seam gas are considerable, many collieries begin the extraction coal-seam gas and are used for generating electricity, no longer be simple being discharged in the atmosphere, both reduce greenhouse effect, saved the energy again, but coal-seam gas had belonged to explosion hazard gases, coal-seam gas concentration can be blasted at 5%-16% chance naked light in the air, so the safe extraction of coal-seam gas is played more and more important effect with conveying.
The pipeline of extraction coal-seam gas at present, is generally selected steel pipe, cast iron tube or polyethylene pipe for use.But steel pipe, cast iron tube easily are corroded in mine humidity, dark environment, and need brush paint regularly, and surface treatment has and increased cost of production; Because unit weight is big, cause the labor intensity that in the space-constrained mine, is difficult for installing, constructing big; Play spark when steel pipe, cast iron tube collide mutually easily, can cause great potential safety hazard in the down-hole.Polyethylene is because its Young's modulus is low, and the dispersion of fire retardant, electrostatic agent is easily inhomogeneous, causes conformity poor, and broken easily by external impacts.
The model utility content
The purpose of this utility model is to provide a kind of unit weight light, and the underground mine use plastic-coated with good fire-retardant, anti-static electricity property, anti-negative pressure ability strengthens the rib Spiral Steel Pipe.
The utility model adopts following technological scheme:
A kind of underground mine use plastic-coated strengthens the rib Spiral Steel Pipe, and steel pipe is provided with the enhancing rib of spiral distribution, and the outer surface of steel pipe, internal surface are respectively equipped with outer wall coating layer and the inwall coating layer of flame-retardant and anti-static, and this steel pipe is welded for there being ribbon spiral to roll.
Above-mentioned enhancing rib and the axis of steel pipe forms an angle and equidistantly arrange, this angle less than 90 degree, strengthens the spacing of rib greater than zero greater than zero degree.
Wherein, to be that steel pipe is colded pressing one-body molded for above-mentioned enhancing rib.This strengthens rib cross section for protruding or semi-circular, camber or square recessed and that be hollow shape.
In addition, above-mentioned enhancing rib also can and be welded on the outer surface of steel tube for the enhancing rib of moulding.The cross section of this enhancing rib can be solid or hollow semi-circular, camber, square.
Above-mentioned welding manner can adopt submerged arc welding, plasma arc welding or carbon-dioxide arc welding.
The outer wall coating layer of above-mentioned flame-retardant and anti-static, inwall coating layer are polyethylene or epoxy coating.
This tubing is composite structured, and unit weight is light, has good fire-retardant, anti-static electricity property, anti-negative pressure ability.In the coal-seam gas extraction system of colliery, owing to be the negative pressure extraction, so the tubing ring stiffness is had relatively high expectations, and underground mine use plastic-coated enhancing rib Spiral Steel Pipe is exactly under the situation that reduces wall thickness, improved ring stiffness greatly, the moment of inertia of comparing its tube wall with solid wall pipe increases greatly, and with respect to the definition S=EI/D of the ring stiffness S of international standard ISO
3(wherein: the Young's modulus of E-material, I-moment of inertia, the average diameter of D-pipe ring) under the constant situation of Young's modulus, average diameter, the increase of moment of inertia has namely increased the ring stiffness of tubing.
The utility model compared with prior art has following beneficial effect:
1, this tubing linear mass is light, has only about the 40%-60% of common steel tube.
2, this tubing is under the situation of identical wall thickness, and ring stiffness exceeds more than 50% than steel pipe, cast iron tube.
3, have good fire-retardant, anti-static electricity property.
4, the coating of this tubing has good antiseptic property, and long service life is applicable to rugged environment under the coal mine.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is several embodiments of the enhancing rib that A place partial enlarged drawing is showed among Fig. 1;
Fig. 3 is cross sectional representation of the present utility model.
Mark among the figure:
1, steel pipe 2, outer wall coating layer 3, inwall coating layer
4, strengthen rib 5, weld seam
H, the spacing a that strengthens rib, enhancing rib and steel pipe axis angle
Embodiment
Referring to Fig. 1,3, a kind of underground mine use plastic-coated of the utility model strengthens the rib Spiral Steel Pipe, and steel pipe 1 is provided with the enhancing rib 4 of spiral distribution, and the outer surface of steel pipe 1, internal surface are respectively equipped with outer wall coating layer 2 and the inwall coating layer 3 that is provided with flame-retardant and anti-static.This outer wall coating layer 2, inwall coating layer 3 can be polyethylene or epoxy coating, and this steel pipe 1 is welded for being rolled by ribbon spiral, that is weld seam 5 is helical.
Above-mentioned enhancing rib 4 forms an angle with the axis of steel pipe 1 and equidistantly arranges, and strengthens rib and steel pipe axis angle a and spends less than 90 greater than zero degree, strengthens the spacing H of rib greater than zero.
Referring to Fig. 2, this accompanying drawing has provided several embodiments of the enhancing rib that A portion enlarged view is showed among Fig. 1.
One of them, strengthening rib 4 can be that steel band is one-body molded through colding pressing.The processing method of this kind situation is: pass through specialized mould, steel band is one-body molded for strengthening rib 4, and rolling through spiral simultaneously and be welded through colding pressing, as for inwall coating layer 3, can be coated in the internal layer (being the inwall of steel pipe 1) of steel band in advance, outer wall coating layer 2 again steel pipe through spiral roll be welded after again row be coated in the skin (being the outer wall of steel pipe 1) of steel band.These enhancing rib 4 cross sections can be to protrude or recessed and be semi-circular, camber or the square of hollow shape.
Figure A-1 show the cross section that strengthens rib 4 for protrude and be the semi-circular or camber structure of hollow shape;
Figure A-2 show the cross section that strengthens rib 4 for protrude and be the square structure of hollow shape;
Figure A-5 shows the cross section that strengthens rib 4 to be recessed and to be the semi-circular or camber structure of hollow shape.
Wherein two, above-mentioned enhancing rib 4 also can and directly be welded on the outer surface of steel pipe for the enhancing rib 4 of moulding.That is strengthening rib 4 can first machine shaping, treats that steel band rolls and after being welded to steel pipe 1, the spiral welding of going again is connected on the outer surface of steel pipe 1 through spiral.The cross section of this enhancing rib 4 can be solid or hollow semi-circular, camber, square.
It is solid semi-circular or camber structure that figure A-3 shows the cross section that strengthens rib 4;
It is hollow semi-circular or camber structure that figure A-4 shows the cross section that strengthens rib 4.
Above-mentioned welding manner can adopt submerged arc welding, plasma arc welding or carbon-dioxide arc welding.
Structure of the present utility model increases greatly than the tube wall moment of inertia of solid wall pipe material, and with respect to the definition S=EI/D of the ring stiffness S of international standard ISO
3(wherein: the Young's modulus of E-material, I-moment of inertia, the average diameter of D-pipe ring) is that the tubing ring stiffness increases greatly.In colliery coal-seam gas extraction pipeline, be not easy to take out flat.
Claims (7)
1. a underground mine use plastic-coated strengthens the rib Spiral Steel Pipe, it is characterized in that, steel pipe is provided with the enhancing rib of spiral distribution, and the outer surface of steel pipe, internal surface are respectively equipped with outer wall coating layer and the inwall coating layer of flame-retardant and anti-static, and this steel pipe is welded for being rolled by ribbon spiral.
2. strengthen the rib Spiral Steel Pipe according to the described underground mine use plastic-coated of claim 1, it is characterized in that, the axis of described enhancing rib and steel pipe forms an angle and equidistantly arranges, and this angle less than 90 degree, strengthens the spacing of rib greater than zero greater than zero degree.
3. strengthen the rib Spiral Steel Pipe according to the described underground mine use plastic-coated of claim 2, it is characterized in that, it is one-body molded that described enhancing rib is that steel band is colded pressing.
4. strengthen the rib Spiral Steel Pipe according to the described underground mine use plastic-coated of claim 3, it is characterized in that, described enhancing rib cross section is for protruding or semi-circular, camber or square recessed and that be hollow shape.
5. strengthen the rib Spiral Steel Pipe according to the described underground mine use plastic-coated of claim 2, it is characterized in that, described enhancing rib is the enhancing rib of moulding and is welded on the outer surface of steel tube.
6. strengthen the rib Spiral Steel Pipe according to the described underground mine use plastic-coated of claim 5, it is characterized in that, the cross section of described enhancing rib is solid or hollow semi-circular, camber, square.
7. strengthen the rib Spiral Steel Pipe according to claim 4 or 6 described underground mine use plastic-coateds, it is characterized in that the outer wall coating layer of described flame-retardant and anti-static, inwall coating layer are polyethylene or epoxy coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320209492 CN203189893U (en) | 2013-04-13 | 2013-04-13 | Plastic coated reinforcement rib spiral steel pipe for underground coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320209492 CN203189893U (en) | 2013-04-13 | 2013-04-13 | Plastic coated reinforcement rib spiral steel pipe for underground coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203189893U true CN203189893U (en) | 2013-09-11 |
Family
ID=49106753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320209492 Expired - Fee Related CN203189893U (en) | 2013-04-13 | 2013-04-13 | Plastic coated reinforcement rib spiral steel pipe for underground coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203189893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269951A (en) * | 2017-08-14 | 2017-10-20 | 昆山普拉斯克机械制造有限公司 | Many rib enhancing composite hollow winding pipe and drainage pipeline |
-
2013
- 2013-04-13 CN CN 201320209492 patent/CN203189893U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269951A (en) * | 2017-08-14 | 2017-10-20 | 昆山普拉斯克机械制造有限公司 | Many rib enhancing composite hollow winding pipe and drainage pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20160413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |