CN202646951U - Polyurethane heat insulation steel tube with polyethylene protecting bush used under coal mine well - Google Patents
Polyurethane heat insulation steel tube with polyethylene protecting bush used under coal mine well Download PDFInfo
- Publication number
- CN202646951U CN202646951U CN 201220299351 CN201220299351U CN202646951U CN 202646951 U CN202646951 U CN 202646951U CN 201220299351 CN201220299351 CN 201220299351 CN 201220299351 U CN201220299351 U CN 201220299351U CN 202646951 U CN202646951 U CN 202646951U
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- steel tube
- layer
- heat insulation
- polyurethane heat
- steel pipe
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Abstract
The utility model relates to a polyurethane heat insulation steel tube with a polyethylene protecting bush under a coal mine well. The polyurethane heat insulation steel tube comprises an inner work steel tube, a heat insulation layer arranged at the outer part of the inner work steel tube, and an outer protecting bush layer arranged at the outer part of the heat insulation layer, wherein the heat insulation layer is injected between the inner work steel tube and the outer protecting bush layer, so that the inner work steel tube and the outer protecting bush layer can be tightly combined. According to the polyurethane heat insulation steel tube, the flame retardance and electric resistance can be prevented, the manufacturing cost is low, and the using effect is good.
Description
Technical field
The utility model relates to universal pipe under a kind of coal mine, particularly relates to underground mine use pe sheath polyurethane heat-insulation steel pipe.
Background technique
At present mostly China's coal mining mine is underground deep-well below 500 meters, and at underground more than 500 meters every dark 100 meters, downhole temperature just improves 2-3 ℃, mine more under the deep-well temperature higher, bring deterioration with regard to the working environment to extractive industry like this.In order to improve this working environment, just must carry out cold and hot displacement in the deep-well and improve working environment.Originally domestic have a small amount of well for deep well coal mine when exploitation, adopts the ice refrigerating method.Be exactly in aboveground first ice making, again ice cube be transported to the down-hole, change ambient temperature.This mode cost is large, and efficient is low, weak effect.The method that adopts now is to carry the cold fluid medium under deep-well, recycles.But at present China does not still have special being used for to carry the pipeline of cold fluid medium under deep-well, owing to being the pipeline that deep-well uses, and will guarantee the temperature of cold fluid medium, so proposed to comprise insulation, the Secretary such as safe, fire-retardant and antistatic.Present existing pipeline is still unavailable.
Summary of the invention
Goal of the invention: the purpose of this utility model is in order to overcome deficiency of the prior art, a kind of flame-retardant and anti-static to be provided, and manufacture cost is lower, and using effect is underground mine use pe sheath polyurethane heat-insulation steel pipe preferably.
Technological scheme: in order to solve the problems of the technologies described above, a kind of underground mine use pe sheath polyurethane heat-insulation steel pipe described in the utility model, it comprises interior working steel tube, is located at the thermal insulation layer of described interior working steel tube outside, and the external sheath layer that is located at described thermal insulation layer outside; Described thermal insulation layer injects between described interior working steel tube and the external sheath layer, so that they are combined closely each other.
Described interior working steel tube is seamless steel pipe or welded steel pipe.
Described thermal insulation layer is the polyurethane rigid foam plastic thermal insulation layer, and its foam density should be less than 60kg/m
3
Described external sheath layer is the high density polyethylene (HDPE) restrictive coating, and its density is at 935kg/m
3～950kg/m
3Between.
Described thermal insulation layer and external sheath layer be flame-retardant and anti-static all, all reaches MT181-1988, MT113-1995 standard.
Iron rust, mill scale, grease, dust, moisture or other contaminants should be removed in interior working steel tube described in the utility model surface, and the steel pipe two ends should reserve the exposed non-heat preservation zone of 150mm～250mm in order to welding; Described outer protective layer should be black, and its internal surface range estimation does not have and loses the groove of its performance, has not allowed the defectives such as bubble, crackle, depression, impurity, uneven color, and the pipe two ends should be cut smooth, and vertical with the axis of pipe, and angular error should be less than 2.5 °.
The utility model is by flame retardant test and surface resistance test.
Beneficial effect: the utility model compared with prior art, its remarkable advantage is: the utility model is simple in structure, manufacture cost is lower, using effect is better, and has simultaneously fire-retardant and anti-static electricity property.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Wherein:
1, interior working steel tube; 2, thermal insulation layer; 3, external sheath layer
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, a kind of underground mine use pe sheath polyurethane heat-insulation steel pipe described in the utility model, it comprises interior working steel tube 1, is located at the thermal insulation layer 2 of described interior working steel tube 1 outside, and the external sheath layer 3 that is located at described thermal insulation layer 2 outsides; Described thermal insulation layer 2 injects between described interior working steel tube 1 and the external sheath layer 3, so that they are combined closely each other; Described interior working steel tube 1 is seamless steel pipe or welded steel pipe; Described thermal insulation layer 2 is the polyurethane rigid foam plastic thermal insulation layer, and its foam density should be less than 60kg/m
3Described external sheath layer 3 is the high density polyethylene (HDPE) restrictive coating, and its density is at 935kg/m
3～950kg/m
3Between; But described thermal insulation layer 2 and external sheath layer 3 be flame-retardant and anti-static all.The utility model is simple in structure, and manufacture cost is lower, and using effect is better, and has simultaneously fire-retardant and anti-static electricity property.
The utility model does not relate to partly all, and the prior art that maybe can adopt same as the prior art is realized.
Claims (5)
1. underground mine use pe sheath polyurethane heat-insulation steel pipe, it is characterized in that: it comprises interior working steel tube (1), be located at the outside thermal insulation layer (2) of described interior working steel tube (1), and be located at the outside external sheath layer (3) of described thermal insulation layer (2); Described thermal insulation layer (2) injects between described interior working steel tube (1) and the external sheath layer (3), so that they are combined closely each other.
2. underground mine use pe sheath polyurethane heat-insulation steel pipe according to claim 1, it is characterized in that: described interior working steel tube (1) is seamless steel pipe or welded steel pipe.
3. underground mine use pe sheath polyurethane heat-insulation steel pipe according to claim 1, it is characterized in that: described thermal insulation layer (2) is the polyurethane rigid foam plastic thermal insulation layer, and its foam density should be less than 60kg/m
3
4. underground mine use pe sheath polyurethane heat-insulation steel pipe according to claim 1, it is characterized in that: described external sheath layer (3) is the high density polyethylene (HDPE) restrictive coating, and its density is at 935kg/m
3～950kg/m
3Between.
5. underground mine use pe sheath polyurethane heat-insulation steel pipe according to claim 1, it is characterized in that: described thermal insulation layer (2) and external sheath layer (3) be flame-retardant and anti-static all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220299351 CN202646951U (en) | 2012-06-25 | 2012-06-25 | Polyurethane heat insulation steel tube with polyethylene protecting bush used under coal mine well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220299351 CN202646951U (en) | 2012-06-25 | 2012-06-25 | Polyurethane heat insulation steel tube with polyethylene protecting bush used under coal mine well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646951U true CN202646951U (en) | 2013-01-02 |
Family
ID=47416059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220299351 Expired - Fee Related CN202646951U (en) | 2012-06-25 | 2012-06-25 | Polyurethane heat insulation steel tube with polyethylene protecting bush used under coal mine well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646951U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748541A (en) * | 2012-06-25 | 2012-10-24 | 江苏京元节能环保有限公司 | Polyethylene (PE)-sheathed polyurethane (PU) heat-insulation steel pipe for coal-mine downholes |
-
2012
- 2012-06-25 CN CN 201220299351 patent/CN202646951U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748541A (en) * | 2012-06-25 | 2012-10-24 | 江苏京元节能环保有限公司 | Polyethylene (PE)-sheathed polyurethane (PU) heat-insulation steel pipe for coal-mine downholes |
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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: 20130102 Termination date: 20150625 |
|
| EXPY | Termination of patent right or utility model |