CN101701659A - Steel sheathed steel steam heat preserving pipeline and lateral displacement sliding support mechanism thereof - Google Patents
Steel sheathed steel steam heat preserving pipeline and lateral displacement sliding support mechanism thereof Download PDFInfo
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- CN101701659A CN101701659A CN200910070276A CN200910070276A CN101701659A CN 101701659 A CN101701659 A CN 101701659A CN 200910070276 A CN200910070276 A CN 200910070276A CN 200910070276 A CN200910070276 A CN 200910070276A CN 101701659 A CN101701659 A CN 101701659A
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Abstract
The invention relates to a steel sheathed steel steam heat preserving pipeline with the nominal diameter of an inner sheathed steel pipe below DN125 and a sliding support mechanism thereof. The mechanism comprises an upper steel hoop, a lower steel hoop, an upper sliding support plate and two lower sliding support plates, wherein the upper sliding support plate is positioned in the center of the upper steel hoop, and the two lower sliding support plates are symmetrically distributed on the lower steel hoop; when the inner sheathed steel pipe is displaced along an axis in an outer sheathed steel pipe, the lower sliding support plates are in contact with the inner wall of an outer steel sheath in a sliding friction way, and an assembly clearance is arranged between the upper sliding support plate and the inner wall of the outer steel sheath. The steel sheathed steel steam heat preserving pipeline comprises the inner sheathed steel pipe, the outer sheathed steel pipe, the sliding support mechanism, heat insulating materials, heat preserving material and a corrosion preventing layer, wherein the corrosion preventing layer is sleeved outside the outer sheathed steel pipe. The invention is just provided with the three sliding support plates and has quite simple process and low cost.
Description
Technical field
The present invention relates to a kind of heat insulation-type steam conveying pipe, further relating to a kind of interior cover steel pipe nominal diameter is the following steel-sleeve steel steam insulation pipe sliding support mechanism of DN125.
Background technique
Steel-sleeve steel steam insulation pipe is a kind of new technology that developed recently gets up, and is used for carrying high-temperature steam (250-350 ℃).Cover steel pipe and outer steel pipe in its structure all comprises basically, middle some thermal insulating materials of filling.Because vapor (steam) temperature is higher, interior cover steel pipe heat distortion amount is bigger, therefore caused interior cover steel pipe in outer steel pipe, to fluctuate or about drift, general thermal insulating material is difficult to bear the amount of deformation that high temperature like this brings, and causes the destruction of thermal insulation layer and the hot-fluid reluctant difficult problem that leaks.Therefore be badly in need of a kind of new steel bushing steel insulation pipe structure of design, to address the above problem.
Summary of the invention
The objective of the invention is to design a kind of interior cover steel pipe nominal diameter of row is following steel-sleeve steel steam insulation pipe and sliding support mechanism thereof of DN125.The present invention realizes in the following way:
Interior cover steel pipe nominal diameter is the following steel-sleeve steel steam insulation pipe sliding support mechanism of DN125, comprising: the last stirrup and following stirrup of cover steel pipe cylindrical shape in bending to; Lay respectively at the last sliding support plate and the lower slider dunnage of stirrup center position up and down, slide up and down dunnage and be connected by welding manner with interior cover outer wall of steel pipe; The end of last stirrup and following stirrup clamps by bolt; When interior cover steel pipe in outer steel pipe during along axis shift, the lower slider dunnage contacts for the sliding friction mode with the inwall of outer steel sleeve, has the fit up gap between the inwall of last sliding support plate and outer steel sleeve.
Interior cover steel pipe nominal diameter is another implementation of the following steel-sleeve steel steam insulation pipe sliding support mechanism of DN125, comprising: the last stirrup and following stirrup of cover steel pipe cylindrical shape in bending to; Go up sliding support plate for 1 that is positioned at the stirrup center position, 2 lower slider dunnages that are symmetrically distributed on the stirrup under being positioned at, upper and lower sliding support plate is connected by welding manner with upper and lower stirrup; The end of last stirrup and following stirrup clamps by bolt; When interior cover steel pipe in outer steel pipe during along axis shift, the lower slider dunnage contacts for the sliding friction mode with the inwall of outer steel sleeve, has the fit up gap between the inwall of last sliding support plate and outer steel sleeve.Preferred 60 degree of the radian angle of described 2 lower slider dunnages on following stirrup circumference.
The cover steel steam heat preserving pipeline comprises: nominal diameter is the following interior cover steel pipe of DN125, and the outer steel pipe with interior cover steel pipe coaxial line also comprises: the outer any as mentioned above steel-sleeve steel steam insulation pipe sliding support mechanism of cover steel pipe in being enclosed within; The thermal-protective material of pad between rolling supporting mechanism and interior cover steel pipe; Overlap outside the steel pipe in being enclosed within, and the thermal insulating material between the steel-sleeve steel steam insulation pipe rolling supporting mechanism, thermal insulating material is the super glass wool shell, takes double-deck fissure of displacement wrapping, the external diameter of thermal insulation layer forms air layer less than the internal diameter of outer steel pipe between the two; Be enclosed within the outer anticorrosive coat of outer steel pipe.
In implementation process of the present invention, can link to each other with vacuum pump at certain position opening of outer steel pipe, the air between the interior outer steel pipe is extracted out, form vacuum heat-insulating layer.
The present invention with respect to the advantage of prior art is:
(1) the present invention only is provided with 2 or 3 sliding support plates, and technology is very simple, and is with low cost.
(2) when inside and outside cover steel shaft line overlap, there are the gap in upper roller and outer steel pipe, this technical characteristics makes that sliding support plate can make progress voluntarily and float instantly when the slip of overcoat steel duct runs into weld seam or other thrust, the axial motion of cover steel pipe in not influencing; Simultaneously, when interior cover steel pipe was subjected to the displacement of external force side, the lower slider dunnage can be easily to two side shiftings, until upper and lower sliding support plate with till the outer steel pipe inwall contacts.
(3) by vaccum-pumping equipment extracting air layer of air, can between outer steel pipe and thermal insulating material, form vacuum layer, improve the heat insulation effect of pipeline; Simultaneously, can also solve outer sleeve inner wall might be by the difficult problem of hot wet atmospheric corrosion; Saved outer steel pipe and every 50-60 rice the technology of humidity discharging pipe has been set, average every mitron line can reduce the cost about 50 yuan.
(4) because sliding support mechanism sliding effect easily, when constructing at the scene, outer steel pipe can not adopt the mode of two half-watt overlap joints welding, but by mobile outer steel pipe, carry out the repaired mouth operation by the root connecting method, can reduce the outer steel pipe weldering peak number amount of 40%-50%; The minimizing of weld seam quantity has not only been shortened installation period, has been reduced the possibility of revealing, and saved a large amount of welding, ultrasound, X ray testing cost; With 1000 mitron road length computation, be 12 meters by every pipe measured length, adopt product of the present invention can save 80 road circumferential welded seams and 160 road longitudinal welds, always save about 150,000 yuan of mounting cost, average every mitron road is saved 150 yuan.
(5) thermal insulating material is the super glass wool shell, takes fissure of displacement wrapping, and it is few to have seam, the characteristics of good permeability; In case and thermal insulation layer intakes in work progress, can be by progressively improving vapor (steam) temperature and the humidity discharging of bleeding, progressively oven dry; Oven dry back shape and the good advantage of thermal insulation property.
Description of drawings
Fig. 1 is embodiment's 1 lateral displacement sliding support mechanism schematic representation.
Fig. 2 is embodiment's 2 lateral displacement sliding support mechanism schematic representation.
The sectional view that Fig. 3 is Fig. 1 along 1-1 and Fig. 2 along 2-2.
Fig. 4 is that the pipeline heat loss is with the vacuum pressure change curve.
Embodiment
Embodiment 1:
Contrast Fig. 1, Fig. 3 illustrate concrete technological scheme of the present invention.In the present embodiment, steel-sleeve steel steam insulation pipe comprises: interior cover steel pipe, diameter are 133 millimeters; The overcoat steel, the pipe diameter is 273 millimeters (Q235B); The thermal-protective material of pad between rolling supporting mechanism and interior cover steel pipe, thermal-protective material thickness is selected 3 millimeters (high-strength heatproof asbestos rubber); Rolling supporting mechanism outside thermal-protective material and between the outer steel pipe; Overlap outside the steel pipe in being enclosed within, and the thermal insulating material between the steel-sleeve steel steam insulation pipe rolling supporting mechanism, thermal insulating material is the super glass wool shell, takes double-deck fissure of displacement wrapping, the external diameter of thermal insulation layer forms air layer less than the internal diameter of outer steel pipe between the two; Be positioned on the outer steel pipe, and the extraction valve that communicates with air layer, by the extraction valve exhaust, can make air layer be converted into vacuum layer; Be enclosed within the outer anticorrosive coat (3PE) of outer steel pipe.
Described rolling supporting mechanism comprises: the last stirrup and the following stirrup of cover steel pipe cylindrical shape in bending to; Lay respectively at the last sliding support plate and the lower slider dunnage of stirrup center position up and down, slide up and down dunnage and be connected by welding manner with interior cover outer wall of steel pipe; Last stirrup is connected by bolt with the end of following stirrup; When interior cover steel pipe and outer steel pipe axis were overlapping, the lower slider dunnage contacted for the sliding friction mode with the inwall of outer steel sleeve, has the gap between the inwall of last sliding support plate and outer steel sleeve, and gap value is 10 millimeters.
Embodiment 2:
Contrast Fig. 2, Fig. 3 illustrate concrete technological scheme of the present invention.In the present embodiment, steel-sleeve steel steam insulation pipe comprises: interior cover steel pipe, diameter are 57 millimeters; The overcoat steel, the pipe diameter is 159 millimeters (Q235B); The thermal-protective material of pad between rolling supporting mechanism and interior cover steel pipe, thermal-protective material thickness is selected 3 millimeters (high-strength heatproof asbestos rubber); Rolling supporting mechanism outside thermal-protective material and between the outer steel pipe; Overlap outside the steel pipe in being enclosed within, and the thermal insulating material between the steel-sleeve steel steam insulation pipe rolling supporting mechanism, thermal insulating material are the super glass wool shell, (take double-deck fissure of displacement wrapping, the external diameter of thermal insulation layer forms air layer less than the internal diameter of outer steel pipe between the two; Be positioned on the outer steel pipe, and the extraction valve that communicates with air layer, by the extraction valve exhaust, can make air layer be converted into vacuum layer; Be enclosed within the outer anticorrosive coat (3PE) of outer steel pipe.
Described rolling supporting mechanism comprises: the last stirrup and the following stirrup of cover steel pipe cylindrical shape in bending to; Go up sliding support plate for 1 that is positioned at the stirrup center position, 2 lower slider dunnages that are symmetrically distributed on the stirrup under being positioned at, upper and lower sliding support plate is connected by welding manner with upper and lower stirrup; Last stirrup is connected by bolt with the end of following stirrup; When interior cover steel pipe and outer steel pipe axis were overlapping, the lower slider dunnage contacted for the sliding friction mode with the inwall of outer steel sleeve, has the gap between the inwall of last sliding support plate and outer steel sleeve.The radian angle of described 2 lower slider dunnages on following stirrup circumference is 60 degree.
Claims (6)
1. interior cover steel pipe nominal diameter is the following steel-sleeve steel steam insulation pipe sliding support mechanism of DN125, it is characterized in that, comprising: the last stirrup and the following stirrup of cover steel pipe cylindrical shape in bending to; Lay respectively at the last sliding support plate and the lower slider dunnage of stirrup center position up and down, slide up and down dunnage and be connected by welding manner with interior cover outer wall of steel pipe; The end of last stirrup and following stirrup clamps by bolt; When interior cover steel pipe in outer steel pipe during along axis shift, the lower slider dunnage contacts for the sliding friction mode with the inwall of outer steel sleeve, has the fit up gap between the inwall of last sliding support plate and outer steel sleeve.
2. steel-sleeve steel steam insulation pipe, comprise: nominal diameter is the following interior cover steel pipe of DN125, outer steel pipe with interior cover steel pipe coaxial line is characterized in that, also comprises: the outer steel-sleeve steel steam insulation pipe sliding support mechanism as claimed in claim 1 of cover steel pipe in being enclosed within; The thermal-protective material of pad between rolling supporting mechanism and interior cover steel pipe; The outer thermal insulating material of cover steel pipe in being enclosed within, thermal insulating material is the super glass wool shell, takes double-deck fissure of displacement wrapping, the external diameter of thermal insulation layer forms 20 millimeters air layer less than the internal diameter of outer steel pipe between the two; Be wrapped in the outer anticorrosive coat of outer steel pipe.
3. interior cover steel pipe nominal diameter is the following steel-sleeve steel steam insulation pipe sliding support mechanism of DN125, it is characterized in that, comprising: the last stirrup and the following stirrup of cover steel pipe cylindrical shape in bending to; Go up sliding support plate for 1 that is positioned at the stirrup center position, 2 lower slider dunnages that are symmetrically distributed on the stirrup under being positioned at, upper and lower sliding support plate and upper and lower stirrup clamp by welding manner; When interior cover steel pipe in outer steel pipe during along axis shift, the lower slider dunnage contacts for the sliding friction mode with the inwall of outer steel sleeve, has the gap between the inwall of last sliding support plate and outer steel sleeve.
According to claim 3 described in cover steel pipe nominal diameter be steel-sleeve steel steam insulation pipe sliding support mechanism below the DN125, it is characterized in that 2 lower slider dunnages radian angle on stirrup circumference down is 60 degree.
5. steel-sleeve steel steam insulation pipe, comprise: nominal diameter is the following interior cover steel pipe of DN125, outer steel pipe with interior cover steel pipe coaxial line is characterized in that, also comprises: the outer steel-sleeve steel steam insulation pipe sliding support mechanism as claimed in claim 3 of cover steel pipe in being enclosed within; The thermal-protective material of pad between rolling supporting mechanism and interior cover steel pipe; The outer thermal insulating material of cover steel pipe in being enclosed within, thermal insulating material is the super glass wool shell, takes double-deck fissure of displacement wrapping, the external diameter of thermal insulation layer forms 20 millimeters air layer less than the internal diameter of outer steel pipe between the two; Be enclosed within the outer anticorrosive coat of outer steel pipe.
6. according to the described steel-sleeve steel steam insulation pipe of claim 5, it is characterized in that the radian angle of described 2 lower slider dunnages on following stirrup circumference is 60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070276A CN101701659A (en) | 2009-08-28 | 2009-08-28 | Steel sheathed steel steam heat preserving pipeline and lateral displacement sliding support mechanism thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070276A CN101701659A (en) | 2009-08-28 | 2009-08-28 | Steel sheathed steel steam heat preserving pipeline and lateral displacement sliding support mechanism thereof |
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| CN101701659A true CN101701659A (en) | 2010-05-05 |
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| CN200910070276A Pending CN101701659A (en) | 2009-08-28 | 2009-08-28 | Steel sheathed steel steam heat preserving pipeline and lateral displacement sliding support mechanism thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202335A (en) * | 2018-11-09 | 2019-01-15 | 上海煤气第管线工程有限公司 | Welding protector for locating pipeling gyroscope traction device |
-
2009
- 2009-08-28 CN CN200910070276A patent/CN101701659A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202335A (en) * | 2018-11-09 | 2019-01-15 | 上海煤气第管线工程有限公司 | Welding protector for locating pipeling gyroscope traction device |
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Open date: 20100505 |